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Ilchenko, S., Mozheiko, T. and Fialkovska, A. 2023. THE PROGNOSTIC SIGNIFICANCE OF SALIVARY PEPSIN LEVEL IN THE DEVELOPMENT OF RECURRENT RESPIRATORY PATHOLOGY IN INFANTS WITH RUMINATION SYNDROME. Eastern Ukrainian Medical Journal. 11, 4 (Dec. 2023), 421-429. DOI:https://doi.org/10.21272/eumj.2023;11(4):421-429.