Comparative Study

Performance of weighted estimating equations for longitudinal binary data with drop-outs missing at random.

Stat Med. 2002 Oct 30;21(20):3035-54.
Review

An overview of practical approaches for handling missing data in clinical trials.

J Biopharm Stat. 2009 Nov 1;19(6):1055-73.
Comparative Study

Sample size estimation for GEE method for comparing slopes in repeated measurements data.

Stat Med. 2003 Apr 30;22(8):1305-15.