A comparison of respondent-driven and venue-based sampling of female sex workers in Liuzhou, China
Sharon S Weir, M Giovanna Merli, Jing Li, Anisha D Gandhi, William W Neely, Jessie K Edwards, Chirayath M Suchindran, Gail E Henderson, Xiang-Sheng Chen
Sexually Transmitted Infections Dec 2012, 88 (Suppl 2) i95-i101; DOI: 10.1136/sextrans-2012-050638