vspВопросы современной педиатрииCurrent Pediatrics1682-55271682-5535Издательство «ПедиатрЪ»10.15690/vsp.v12i5.800vsp-282Research ArticleОБМЕН ОПЫТОМEXCHANGE OF EXPERIENCEДИФФЕРЕНЦИРОВАННЫЙ ПОДХОД К ВВЕДЕНИЮ ПРИКОРМАA DIFFERENTIATED APPROACH TO THE INTRODUCTION OF COMPLEMENTARY BABY FOODКондратьеваЕ. И.Kondrat'evaE. I.

Kondratyeva Elena Ivanovna, Doctor of Medical Sciences, Professor of the Department of Pediatrics

elenafpk@mail.ruСтанкевичС. С.StankevichS. S.elenafpk@mail.ruСибирский государственный медицинский университет, ТомскРоссияSiberian State Medical University, TomskRussian FederationЦентр медицинской профилактики, ТомскРоссияMedical Prevention Centre, TomskRussian Federation201319092013125Вопросы современной педиатрии6673Copyright © Кондратьева Е.И., Станкевич С.С., 20132013Кондратьева Е.И., Станкевич С.С.Kondrat'eva E.I., Stankevich S.S.This work is licensed under a Creative Commons Attribution 4.0 License.https://vsp.spr-journal.ru/jour/article/view/282

Анализируются вопросы организации рационального вскармливания детей на первом году жизни с использованием продуктов прикорма промышленного выпуска. Обосновывается необходимость введения прикорма в период от 4 до 6 мес жизни. Приводятся рекомендации по срокам и последовательности введения продуктов и блюд прикорма у здоровых детей и детей, имеющих алиментарно-зависимую патологию. Последовательность введения отдельных продуктов и блюд прикорма индивидуальна, возраст для введения первого прикорма зависит от состояния здоровья (пищевая аллергия, анемия), нутритивного статуса ребенка (избыток и дефицит массы тела) и состояния его пищеварительной системы (заболевания, сопровождающиеся синдромом мальабсорбции, функциональные нарушения).

Обсуждается целесообразность использования в питании детей первого года жизни продуктов и блюд прикорма промышленного производства, которые изготавливают из высококачественного сырья и которые соответствуют строгим гигиеническим требованиям к показателям безопасности, имеют гарантированный химический состав. Представлены данные о практике консультирования по вопросам введения прикорма в Центре поддержки грудного и рационального вскармливания г. Томска. По данным Центра, проблема введения прикорма при аллергии и нутритивных нарушениях является ведущей, каждая пятая женщина испытывает трудности при введении прикорма своему ребенку.

The questions of organization of rational feeding of children in the first year of life with the use of industrial production of weaning foods are discussed. The article provides guidance on the timing and sequence of the introduction of complementary baby food in healthy children and children with alimentary disorders. The sequence of individual products and administration of individual meals depends on the health status, nutritional status of the child and the state of his digestive system. In the diet of the child should be used food and meals of industrial production, made of raw materials of high quality which meet the stringent hygienic requirements for safety parameters and have guaranteed by chemical composition. The article presents data on practical advice on the introduction of feeding in the Centre of breast feeding support and management of Tomsk.

прикормНациональная программадети первого года жизнинутритивный статусдефицитные состояниязаболевания желудочно-кишечного трактаbaby foodthe National Program of optimization-feeding infants in Russian Federationalimentary allergiesceliac diseaseprotein-energy malnutritionReferencesNatsional’Naya Programma Optimizatsii Vskarmlivaniya Detey Pervogo Goda Zhizni v Rossiyskoy Federatsii [National Optimization Program of Infants Feeding in the Russian Federation]. Moscow, 2011. 68 p.Natsional’Naya Programma Optimizatsii Vskarmlivaniya Detey Pervogo Goda Zhizni v Rossiyskoy Federatsii [National Optimization Program of Infants Feeding in the Russian Federation]. Moscow, 2011. 68 p.Pitanie Zdorovogo i Bol'nogo Rebenka. 5-e Izdanie [Nutrition of Healthy and Sick Child. 5th Edition]. Edited by V. A. Tutelyan, I.Ya. Kon’, B. S. Kaganova. Moscow, Dinastiya Publ., 2011. 280 p.Pitanie Zdorovogo i Bol'nogo Rebenka. 5-e Izdanie [Nutrition of Healthy and Sick Child. 5th Edition]. Edited by V. A. Tutelyan, I.Ya. Kon’, B. S. Kaganova. Moscow, Dinastiya Publ., 2011. 280 p.Gribakin S. G. Fiziologicheskie Predposylki Vvedeniya Prikorma [Physiological Background of Complementary Feeding]. Voprosy sovremennoy pediatrii [Current Pediatrics]. 2003; 2 (4): 61–66.Gribakin S. G. Fiziologicheskie Predposylki Vvedeniya Prikorma [Physiological Background of Complementary Feeding]. Voprosy sovremennoy pediatrii [Current Pediatrics]. 2003; 2 (4): 61–66.Dubrovskaya M. I., Mukhina Yu. G., Shumilov P. V., Yudina O. V., Ipatova M. G. Sovremennye Podkhody k Vvedeniyu Prikorma pri Pishchevoy Allergii u Detey [Modern Approaches to the Introduction of Complementary Foods at Food Allergies in Children]. Trudniy Patsient [A Difficult Patient]. 2007; 10: 65–71.Dubrovskaya M. I., Mukhina Yu. G., Shumilov P. V., Yudina O. V., Ipatova M. G. Sovremennye Podkhody k Vvedeniyu Prikorma pri Pishchevoy Allergii u Detey [Modern Approaches to the Introduction of Complementary Foods at Food Allergies in Children]. Trudniy Patsient [A Difficult Patient]. 2007; 10: 65–71.Safronova A. I. Produkty Prikorma na Zernovoy Osnove v Pitanii Detey Pervogo Goda Zhizni [Cereal-Based Complementary Foods in the Diet of Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2010; 8 (5): 50–52.Safronova A. I. Produkty Prikorma na Zernovoy Osnove v Pitanii Detey Pervogo Goda Zhizni [Cereal-Based Complementary Foods in the Diet of Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2010; 8 (5): 50–52.Kon’ I.Ya. Sovremennye Predstavleniya ob Optimal'nykh Srokakh Vvedeniya Prikorma v Pitanii Detey Pervogo Goda Zhizni [Modern Representations about the Optimal Timing of Complementary Foods Introduction in the Diet of Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2006; 4 (3): 78–80.Kon’ I.Ya. Sovremennye Predstavleniya ob Optimal'nykh Srokakh Vvedeniya Prikorma v Pitanii Detey Pervogo Goda Zhizni [Modern Representations about the Optimal Timing of Complementary Foods Introduction in the Diet of Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2006; 4 (3): 78–80.Kon’ I.Ya. Nekotorye Aktual'nye Problemy Sovremennoy Detskoy Dietologii (Nutritsiologii) [Some Problems of Modern Nutrition of Children (Nutritiology)]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2003; 1 (1): 8–15.Kon’ I.Ya. Nekotorye Aktual'nye Problemy Sovremennoy Detskoy Dietologii (Nutritsiologii) [Some Problems of Modern Nutrition of Children (Nutritiology)]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2003; 1 (1): 8–15.Gribakin S. G. Znachenie Produktov Detskogo Pitaniya, Obogashchennykh Zhelezom, v Profilaktike Zhelezodefitsitnoy Anemii [Value of Baby Foods Fortified with Iron in the Prevention of Iron Deficiency Anemia]. Voprosy sovremennoy pediatrii [Current Pediatrics]. 2002; 1 (5): 52–56.Gribakin S. G. Znachenie Produktov Detskogo Pitaniya, Obogashchennykh Zhelezom, v Profilaktike Zhelezodefitsitnoy Anemii [Value of Baby Foods Fortified with Iron in the Prevention of Iron Deficiency Anemia]. Voprosy sovremennoy pediatrii [Current Pediatrics]. 2002; 1 (5): 52–56.Dyubkova T. P. Organizatsiya Pitaniya Grudnykh Detey pri Pishchevoy Allergii [Nutrition of Infants with Food Allergies]. Meditsinskaya Panorama [Medical Panorama]. 2006; 1 (58): 53–58.Dyubkova T. P. Organizatsiya Pitaniya Grudnykh Detey pri Pishchevoy Allergii [Nutrition of Infants with Food Allergies]. Meditsinskaya Panorama [Medical Panorama]. 2006; 1 (58): 53–58.Tseliakiya u Detey [Celiac Disease in Children]. Edited by S. V. Belmer, M. O. Revnova. Moscow, Medpraktika-M Publ., 2010. 392 p.Tseliakiya u Detey [Celiac Disease in Children]. Edited by S. V. Belmer, M. O. Revnova. Moscow, Medpraktika-M Publ., 2010. 392 p.Borovik T. E., Roslavtseva E. A., Yatsyk G. V., Skvortsova V. A., Semyonov N. N. Natsional'naya Strategiya Vskarmlivaniya Detey Pervogo Goda Zhizni. Lechebnoe Pitanie pri Neperenosimosti Uglevodov i Tseliakii [National Strategy for Feeding Infants. Medical Nutrition at Carbohydrate Intolerance and Celiac Disease]. Praktika pediatra [Pediatrician’s Practice]. 2009; 2:10–16.Borovik T. E., Roslavtseva E. A., Yatsyk G. V., Skvortsova V. A., Semyonov N. N. Natsional'naya Strategiya Vskarmlivaniya Detey Pervogo Goda Zhizni. Lechebnoe Pitanie pri Neperenosimosti Uglevodov i Tseliakii [National Strategy for Feeding Infants. Medical Nutrition at Carbohydrate Intolerance and Celiac Disease]. Praktika pediatra [Pediatrician’s Practice]. 2009; 2:10–16.Kondratyeva E. I., Tukhvatulina T. A., Nazarenko L. P., Rudko A.A., Loshkova E. V. Opyt Organizatsii Meditsinskoy Pomoshchi Bol'nym Tseliakiey [Experience in Organizing Medical Care for Patients with Celiac Disease]. Sibirskiy Vestnik Gepatologii i Gastroenterologii [Siberian Herald of Hepatology and Gastroenterology]. 2006; No. 20: 73–76.Kondratyeva E. I., Tukhvatulina T. A., Nazarenko L. P., Rudko A.A., Loshkova E. V. Opyt Organizatsii Meditsinskoy Pomoshchi Bol'nym Tseliakiey [Experience in Organizing Medical Care for Patients with Celiac Disease]. Sibirskiy Vestnik Gepatologii i Gastroenterologii [Siberian Herald of Hepatology and Gastroenterology]. 2006; No. 20: 73–76.Averkina N. A. Osobennosti Techeniya Tseliakii u Detey pri Dlitel'noy Patogeneticheskoy Terapii [Features of Celiac Disease Course in Children at Prolonged Pathogenetic Therapy]. Avtoreferatdissertatsiya kandidata meditsinskikh nauk [Autoabstract-thesis of Candidate of Medical Sciences]. Moscow, 2007. 29 p.Averkina N. A. Osobennosti Techeniya Tseliakii u Detey pri Dlitel'noy Patogeneticheskoy Terapii [Features of Celiac Disease Course in Children at Prolonged Pathogenetic Therapy]. Avtoreferatdissertatsiya kandidata meditsinskikh nauk [Autoabstract-thesis of Candidate of Medical Sciences]. Moscow, 2007. 29 p.World Health Organization (WHO). Iron deficiency anemia: assessment, prevention and control. Geneva: WHO. 2001. 298 p.World Health Organization (WHO). Iron deficiency anemia: assessment, prevention and control. Geneva: WHO. 2001. 298 p.Sorvacheva T. N., Pyryeva E. A. Alimentarnaya Profilaktika Zhelezo defitsitnykh Sostoyaniy u Detey Pervogo Goda Zhizni [Nutritional Prevention of Iron Deficiency in Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2009; 4: 25–30.Sorvacheva T. N., Pyryeva E. A. Alimentarnaya Profilaktika Zhelezo defitsitnykh Sostoyaniy u Detey Pervogo Goda Zhizni [Nutritional Prevention of Iron Deficiency in Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2009; 4: 25–30.Lozoff B., Jimenez E., Smith J. B. Double burden of iron deficiency in infancy and low socioeconomic status: a longitudinal analysis of cognitive test scores to age 19 years. Arch. Pediatr. Adolesc. Med. 2006; 160 (11): 1108–1113.Lozoff B., Jimenez E., Smith J. B. Double burden of iron deficiency in infancy and low socioeconomic status: a longitudinal analysis of cognitive test scores to age 19 years. Arch. Pediatr. Adolesc. Med. 2006; 160 (11): 1108–1113.Zakharova M. N., Korovina N. A., Zaplatnikov A. L. Korrektsiya Defitsita Zheleza u Detey [Correction of Iron Deficiency in Children]. Lechashchiy vrach [Doctor in Charge]. 2008; 7: 34–38.Zakharova M. N., Korovina N. A., Zaplatnikov A. L. Korrektsiya Defitsita Zheleza u Detey [Correction of Iron Deficiency in Children]. Lechashchiy vrach [Doctor in Charge]. 2008; 7: 34–38.Engelmann Mads D. M., Sandstrom B., Michaelsen K. F. Meat intake and iron status in late infancy: an intervention study. J. Pediatr. Gastroenterol. Nutr. 1998; 26: 26–33.Engelmann Mads D. M., Sandstrom B., Michaelsen K. F. Meat intake and iron status in late infancy: an intervention study. J. Pediatr. Gastroenterol. Nutr. 1998; 26: 26–33.Kon’ I.Ya., Larionova Z. G., Rusnak F. I., Bushuev S. L., Shevelyova S. A., Kuznetsova G. G., Batishcheva S.Yu. Klinicheskaya Otsenka Effektivnosti Probioticheskogo Produkta v Lechenii Funktsional'nykh Zaporov u Detey Doshkol'nogo i Shkol'nogo Vozrasta [Clinical Evaluation of the Probiotic Product Effectiveness in the Treatment of Functional Constipation in Children of Preschool and School-Age]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2005; 3 (1): 5–10.Kon’ I.Ya., Larionova Z. G., Rusnak F. I., Bushuev S. L., Shevelyova S. A., Kuznetsova G. G., Batishcheva S.Yu. Klinicheskaya Otsenka Effektivnosti Probioticheskogo Produkta v Lechenii Funktsional'nykh Zaporov u Detey Doshkol'nogo i Shkol'nogo Vozrasta [Clinical Evaluation of the Probiotic Product Effectiveness in the Treatment of Functional Constipation in Children of Preschool and School-Age]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2005; 3 (1): 5–10.Bulatov E. M., Bogdanova N. M., Pirtskhelava M. D., Shesta kova M. D., Lobanova E. A. Dieticheskaya Korrektsiya Zaporov u Detey Pervogo Goda Zhizni [Dietary Correction of Constipation in Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2004; 2 (5): 51–57.Bulatov E. M., Bogdanova N. M., Pirtskhelava M. D., Shesta kova M. D., Lobanova E. A. Dieticheskaya Korrektsiya Zaporov u Detey Pervogo Goda Zhizni [Dietary Correction of Constipation in Infants]. Voprosy Detskoy Dietologii [Problems of Pediatric Nutritiology]. 2004; 2 (5): 51–57.Denisov M.Yu. Funktsional'nyy Zapor. Vosstanovitel'noe Lechenie ot Mladentsa do Podrostka [Functional Constipation. Rehabilitation Treatment from Infant to Teenager]. Novosibirsk, NGU Publ., 2011. 122 p.Denisov M.Yu. Funktsional'nyy Zapor. Vosstanovitel'noe Lechenie ot Mladentsa do Podrostka [Functional Constipation. Rehabilitation Treatment from Infant to Teenager]. Novosibirsk, NGU Publ., 2011. 122 p.Belmer S. V. Lechenie Zaporov u Detey Pervykh Let Zhizni Preparatami Laktulozy [Constipation Treatment Using Lactulose Drugs in Children during the First Years of Life]. Detskiy doktor [Children’s Doctor]. 2001; 1: 46–48.Belmer S. V. Lechenie Zaporov u Detey Pervykh Let Zhizni Preparatami Laktulozy [Constipation Treatment Using Lactulose Drugs in Children during the First Years of Life]. Detskiy doktor [Children’s Doctor]. 2001; 1: 46–48.Sorvacheva T. N., Pashkevich V. V., Efimov B. A., Kon’ I.Ya. Klinicheskaya Effektivnost' Primeneniya Smesi “Semper Bifidus” u Detey Pervykh Mesyatsev Zhizni s Funktsional'nymi Zaporami [Clinical Efficacy of Semper Bifidus Mixture in Infants with Functional Constipation]. Detskiy doktor [Children’s Doctor]. 2001; 3: 27–29.Sorvacheva T. N., Pashkevich V. V., Efimov B. A., Kon’ I.Ya. Klinicheskaya Effektivnost' Primeneniya Smesi “Semper Bifidus” u Detey Pervykh Mesyatsev Zhizni s Funktsional'nymi Zaporami [Clinical Efficacy of Semper Bifidus Mixture in Infants with Functional Constipation]. Detskiy doktor [Children’s Doctor]. 2001; 3: 27–29.Ladodo K. S., Borovik T. E., Skvortsova V. A., Timofeeva A. G. Tseleso obraznost' Ispol'zovaniya Kash, Soderzhashchikh Prebiotiki, v Detskom Pitanii [Porridges Containing Prebiotics and Their Usefulness in Infant Nutrition]. Consilium medicum. Prilozhenie «Pediatriya» [Consilium medicum. Appendix: Pediatrics]. 2004. 2: 31–33.Ladodo K. S., Borovik T. E., Skvortsova V. A., Timofeeva A. G. Tseleso obraznost' Ispol'zovaniya Kash, Soderzhashchikh Prebiotiki, v Detskom Pitanii [Porridges Containing Prebiotics and Their Usefulness in Infant Nutrition]. Consilium medicum. Prilozhenie «Pediatriya» [Consilium medicum. Appendix: Pediatrics]. 2004. 2: 31–33.Sovremennye Predstavleniya o Vskarmlivanii Detey Pervogo Goda Zhizni: Posobie dlya Vrachey [Modern Views on Feeding Infants: A Guide for Doctors]. Edited by A. A. Baranov and V. A. Tutelyan. Moscow, MZSRiRF Publ., 2005. 32 p.Sovremennye Predstavleniya o Vskarmlivanii Detey Pervogo Goda Zhizni: Posobie dlya Vrachey [Modern Views on Feeding Infants: A Guide for Doctors]. Edited by A. A. Baranov and V. A. Tutelyan. Moscow, MZSRiRF Publ., 2005. 32 p.Borovik T. E., Ladodo K. S., Makarova S. G., Skvortsova V. A. Sovremennyy Vzglyad na Rol' Detskikh Kash v Pitanii Detey Grudnogo Vozrasta [Modern View on the Role of Children's Porridges in the Diet of Infants]. Pediatriya [Pediatrics]. 2007; 1 (6): 16–21.Borovik T. E., Ladodo K. S., Makarova S. G., Skvortsova V. A. Sovremennyy Vzglyad na Rol' Detskikh Kash v Pitanii Detey Grudnogo Vozrasta [Modern View on the Role of Children's Porridges in the Diet of Infants]. Pediatriya [Pediatrics]. 2007; 1 (6): 16–21.Skvortsova V. A., Netrebenko O. K., Borovik T. E. Narusheniya Pitaniya u Detey Rannego Vozrasta [Malnutrition in Young Children]. Pediatriya [Pediatrics]. 2011; 1 (4): 32–36.Skvortsova V. A., Netrebenko O. K., Borovik T. E. Narusheniya Pitaniya u Detey Rannego Vozrasta [Malnutrition in Young Children]. Pediatriya [Pediatrics]. 2011; 1 (4): 32–36.Jahoor F., Badaloo A., Reid M. et al. Protein metabolism in severe childhood malnutrition. Ann. Trop. Paediatr. 2008; 28 (2): 87–101.Jahoor F., Badaloo A., Reid M. et al. Protein metabolism in severe childhood malnutrition. Ann. Trop. Paediatr. 2008; 28 (2): 87–101.Sawaya A. L., Martins P. A., Martins V.J.B. et al. Malnutrition, long term health and the effect of nutritional recovery. Nestle Nutrition Institute. 2009; 63: 95–108.Sawaya A. L., Martins P. A., Martins V.J.B. et al. Malnutrition, long term health and the effect of nutritional recovery. Nestle Nutrition Institute. 2009; 63: 95–108.Kon’ I.Ya., Abramova T. V., Kurkova V. I., Pustograev N. N. Kashi v Pitanii Detey Pervogo Goda Zhizni [Porridges in Infant Nutrition]. Lechashchiy vrach [Doctor in Charge]. 2008; 6: 26–30.Kon’ I.Ya., Abramova T. V., Kurkova V. I., Pustograev N. N. Kashi v Pitanii Detey Pervogo Goda Zhizni [Porridges in Infant Nutrition]. Lechashchiy vrach [Doctor in Charge]. 2008; 6: 26–30.Kapranov N. I., Kashirskaya N.Yu., Voronkova A.Yu., Shabolova L. A. Mukovistsidoz Sovremennye Dostizheniya i Aktual'nye Problemy. Metodologicheskie Rekomendatsii [Cystic Fibrosis (Modern Achievements and Challenges. Methodological Recommendations]. 3rd edition, revised and expanded. Moscow, Medpraktika-M Publ., 2008. 124 p.Kapranov N. I., Kashirskaya N.Yu., Voronkova A.Yu., Shabolova L. A. Mukovistsidoz Sovremennye Dostizheniya i Aktual'nye Problemy. Metodologicheskie Rekomendatsii [Cystic Fibrosis (Modern Achievements and Challenges. Methodological Recommendations]. 3rd edition, revised and expanded. Moscow, Medpraktika-M Publ., 2008. 124 p.Kondratyeva E. I., Yankina G. N. Dieta i Fermentnaya Terapiya pri Mukovistsidoze u Detey (Oshibki Praktikuyushchikh Vrachey) [Diet and Enzyme Treatment in Children with Cystic Fibrosis (Errors of Medical Practitioners)]. Mat' i ditya v Kuzbasse. Aktual'nye voprosy pitaniya detey rannego vozrasta. Spetsial'niy Vypusk [Mother and Child in Kuzbass. Topical Issues of Infant Feeding. Special Edition]. 2012; 3: 77–83.Kondratyeva E. I., Yankina G. N. Dieta i Fermentnaya Terapiya pri Mukovistsidoze u Detey (Oshibki Praktikuyushchikh Vrachey) [Diet and Enzyme Treatment in Children with Cystic Fibrosis (Errors of Medical Practitioners)]. Mat' i ditya v Kuzbasse. Aktual'nye voprosy pitaniya detey rannego vozrasta. Spetsial'niy Vypusk [Mother and Child in Kuzbass. Topical Issues of Infant Feeding. Special Edition]. 2012; 3: 77–83.Sirotkin E. A. Mukovistsidoz. Diagnostika, Kliniko-Geneticheskaya Kharakteristika, Regional'nye Osobennosti, Meditsinskie i Sotsial'nye Problemy, Profilaktika [Cystic Fibrosis (Diagnosis, Clinical and Genetic Characteristics, Regional Characteristics, Health and Social Problems, Prevention)]. Avtoreferat-dissertatsiya doktora meditsinskikh nauk [Autoabstract-thesis of Doctor of Medical Science]. Saratov, 1999. 44 p.Sirotkin E. A. Mukovistsidoz. Diagnostika, Kliniko-Geneticheskaya Kharakteristika, Regional'nye Osobennosti, Meditsinskie i Sotsial'nye Problemy, Profilaktika [Cystic Fibrosis (Diagnosis, Clinical and Genetic Characteristics, Regional Characteristics, Health and Social Problems, Prevention)]. Avtoreferat-dissertatsiya doktora meditsinskikh nauk [Autoabstract-thesis of Doctor of Medical Science]. Saratov, 1999. 44 p.

The authors declare that there are no conflicts of interest present.