Nataliya Banadyha1, Igor Rogalskyy1, Roman Komorovsky2. 1. Department of Pediatrics, Institute of Postgraduate Education, I. Horbachevsky Ternopil State Medical University, Ternopil, Ukraine. 2. Department of Internal Medicine, I. Horbachevsky Ternopil State Medical University-Ternopil University Hospital, vul. Klinichna, 1, Ternopil, 46002, Ukraine. roman_komor@yahoo.com.