1. Department of Obstetrics and Gynecology, Kamineni Institute of Medical Sciences, Narketpally, Andhra Pradesh, India.
2. Obstetrics and Gynecology Dr Pinnamaneni Siddartha Institute of Medical Sciences & Research Foundation, Chinnoutpalli, Gannavarum Krishna (dist), Andhra Pradesh, India.
3. Institute of Medical Sciences & Research Foundation, Chinnoutpalli, Gannavarum Krishna (dist), Andhra Pradesh, India.
4. Department of Radiodiagnosis, Institute of Medical Sciences, St Michael's Hosptial, Toronto, Canada.