Gretchen Henkel is writing the Metrics in Rheumatology series.
References
- Daltroy LH, Iversen MD, Larson MG, et al. A controlled trial of an educational program to prevent low back injuries. N Engl J Med. 1997. 337:322-328.
- Sanchez-Guerrero J, Colditz GA, Karlson EW, et al. Silicone breast implants and the risk of connective-tissue diseases and symptoms. 1995. N Engl J Med. 332:1666-1671.