Gurdev Lal Goyal, Anjana Mittal1, Chintu Chaudhary2, Rachna Bachhel3, Simran Grewal, Manjit Rai4
Departments of Physiology, 1Anatomy, and 2Community Medicine, MMMC and H, Solan, Himachal Pradesh, 3Departments of Physiology, and 4Medicine, GMC, Amritsar, Punjab, India