SubbaRao M Gavaravarapu1, Katherine C Smith2, Rajiv N Rimal3. 1. National Institute of Nutrition, Hyderabad, 500007 AP, India. Electronic address: gmsubbarao@yahoo.com. 2. Department of Health Behavior & Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. 3. Department of Prevention & Community Health, George Washington University, Washington DC, USA.