DOI:
10.1055/s-00000012
Endoscopy
LinksClose Window
References
Warner L, Macaluso M, Austin HD et al.
Application of the case-crossover design to reduce unmeasured confounding in studies of condom effectiveness.
Am J Epidemiol 2005;
161: 765-773
We do not assume any responsibility for the contents of the web pages of other providers.