@article{Lau2003,
author = {Lau, J.T. and Tsui, H.Y. and Wang, Q.S.},
title= {Effects of two telephone survey methods on the level of reported risk behaviours},
year = {2003},
doi = {10.1136/sti.79.4.325},
journal = {Sexually Transmitted Infections},
volume = {79},
number = {4},
pages = {325--331},
}