Aleksandr M. Shabalov has completed his PhD at the age of 30 years from Saint Petersburg State Pediatric Medical University, Ministry of Health of the Russian Federation, Saint Petersburg, Russia. He is the MD, Assistant Professor of the Department of Children's Diseases, Kirov Military Medical Academy, Saint Petersburg, Russia. He has over 120 publications that have been cited over 420 times, and his publication h-index is 9. He is a pediatrician and gastroenterologist interested in functional disorders of gastrointestinal tract, SIBO, GERD, pediatric allergy, obesity, MAFLD with 19 years of experience.