1. ANOVA
http://en.wikipedia.org/wiki/Analysis_of_variance
2. Aragon TJ (2011) Applied epidemiology using R (epir). UC Berkeley School of Public Health, and San Francisco Department of Public Health, Berkeley
3. BMI Notes (2012) Body mass index.
http://en.wikipedia.org/wiki/Body_mass_index
4. Centers for Disease Control and Prevention (2005) Antiretroviral postexposure Prophylaxis after sexual, injection-drug use, or other nonoccupational exposure to HIV in the United States: recommendations from the U.S. Department of Health and Human Services. MMWR Recomm Rep 54(RR-2):1–20 Available from:
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5402a1.htm
5. CRAN, The comprehensive R archive network:
http://cran.r-project.org/