Author information Asim Kurjak MD PhD Professor, Department of Obstetrics and Gynaecology, Medical School Universities of Zagreb and Sarajevo, Professor (Emeritus), University Sarajevo School of Science and Technology, Ilid?a, Bosnia and Herzegovina President, International Academy of Perinatal Medicine, Founder and Director, Ian Donald Inter-University School of Medical Ultrasound, Zagreb, Croatia Frank A Chervenak MD Chair, Obstetrics and Gynaecology, Lenox Hill Hospital, Zucker School of Medicine, Hofstra/Northwell, New York, USA