@article{Carter2012,
author = {Carter, K. and Imlach-Gunasekara, F. and McKenzie, S.K. and Blakely, T.},
title= {Differential loss of participants does not necessarily cause selection bias},
year = {2012},
doi = {10.1111/j.1753-6405.2012.00867.x},
volume = {36},
number = {3},
pages = {218--222},
}