1. National Heart, Lung, and Blood Institute, Morbidity and Mortality: 2012 Chartbook on Cardiovascular, Lung, and Blood Diseases. At http://www.nhlbi.nih.gov/resources/docs/2012_ChartBook_508.pdf; Accessed 09.05.12.
2. IC Health. National Cardiovascular Disease Database. At http://www.whoindia.org/LinkFiles/NMH_Resources_National_CVD_database-Final_Report.pdf; Accessed 10.05.12.
3. The global burden of disease: 2004 update. World Health Organization 2008. At http://www.who.int/healthinfo/global_burden_disease/GBD_report_2004update_full.pdf; Accessed 10.05.12.
4. Report of the working group on drugs and pharmaceuticals for the eleventh five-year plan (2007–2012), Planning commission of India. At http://planningcommission.nic.in/aboutus/committee/wrkgrp11/wg11_pharma.pdf; Accessed 09.05.12.
5. The drug lag revisited: comparison by therapeutic area of patterns of drugs marketed in the United States and Great Britain from 1972 through 1976;Wardell;Clin Pharmacol Ther,1978