1. Department of Obstetrics and Gynaecology, Era’s Lucknow Medical College and Hospital, Lucknow, Uttar Pradesh, India
2. Department of Obstetrics and Gynaecology, RML Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
3. Department of Obstetrics and Gynaecology, The University of Texas Health Science Center, San Antonio, Texas, USA