@article{Minnis2009,
author = {Minnis, A.M. and Steiner, M.J. and Gallo, M.F. and Warner, L. and Hobbs, M.M. and van der Straten, A. and Chipato, T. and Macaluso, M. and Padian, N.S.},
title= {Biomarker validation of reports of recent sexual activity: Results of a randomized controlled study in Zimbabwe},
year = {2009},
doi = {10.1093/aje/kwp219},
journal = {American Journal of Epidemiology},
volume = {170},
number = {7},
pages = {918--924},
}