Savita Rani Singhal is a Professor in the Department of Obstetrics and Gynaecology, and Suresh Kumar Singhal is a Senior Professor in the Department of Anesthesia, Pt BD Sharma Post-Graduate Institute of Medical Sciences, Rohtak, Haryana, India.
This work described has not been published before; that it is not under consideration for publication anywhere else; that its publication has been approved by all co-authors.