Siwatch Sujata, Noor Mohd Talha, Dutta Usha, Kochhar Rakesh, Behera Arunanshu, Singh Kartar
Department of Obstetrics & Gynecology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Trop Gastroenterol. 2011 Oct-Dec;32(4):339-41.