I. A. Ozerskaya
Peoples' Friendship University of Russia named after Patrice Lumumba; 6, Miklukho-Maklay str., Moscow 117198, Russian Federation
Russian Federation

Irina A. Ozerskaya – Doct. of Sci. (Med.), Professor, Professor of the Department of Ultrasound Diagnostics of the Faculty of Continuing Medical Education of the Medical Institute of the Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University), Moscow

G. G. Kazaryan
LLC “Medskan”; 21A, Obrucheva str., Moscow 119421, Russian Federation
Russian Federation

Gayane G. Kazaryan – Cand. of Sci. (Med.), Head of the department of ultrasound, LLC “Medskan”, Moscow

A. I. Gus
Peoples' Friendship University of Russia named after Patrice Lumumba; 6, Miklukho-Maklay str., Moscow 117198, Russian Federation Research Center for Obstetrics, Gynecology and Perinatology named after academician V.I. Kulakov of the Ministry of Healthcare of the Russian Federation; 4, Akademika Oparina str., Moscow 117997, Russian Federation
Russian Federation

Alexandr I. Gus – Doct. of Sci. (Med.), Professor, Head of the Department of Ultrasound Diagnostics of the Faculty of Continuing Medical Education of the Medical Institute of the Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University); 
Chief Researcher of department of ultrasound and functional diagnostics, visual diagnostics department of the Research Center for Obstetrics, Gynecology and Perinatology named after academician V.I. Kulakov of the Ministry of Healthcare of the Russian Federation, Moscow