Effect of Structured Yoga Program on Stress and Professional Quality of Life Among Nursing Staff in a Tertiary Care Hospital of Delhi—A Small Scale Phase-II Trial oleh Suprakash Mandal MD, Puneet Misra MD, MPH, Gautam Sharma MD, Rajesh Sagar MD, Shashi Kant MD, SN Dwivedi PhD, R. Lakshmy PhD, Kiran Goswami MD