@article{van der Elst2009,
author = {van der Elst, E.M. and Okuku, H.S. and Nakamya, P. and Muhaari, A. and Davies, A. and McClelland, R.S. and Price, M.A. and Smith, A.D. and Graham, S.M. and Sanders, E.J.},
title= {Is audio computer-assisted self-interview (ACASI) useful in risk behaviour assessment of female and male sex workers},
year = {2009},
doi = {10.1371/journal.pone.0005340},
volume = {4},
number = {5},
pages = {e5340},
}