Missing data in randomized clinical trials for weight loss: scope of the problem, state of the field, and performance of statistical methods.
Elobeid MA, Padilla MA, McVie T, Thomas O, Brock DW, Musser B, Lu K, Coffey CS, Desmond RA, St-Onge MP, et al.
PLoS One. 2009 Aug 13; 4(8):e6624. Epub 2009 Aug 13.
[PLoS One. 2009]