Analysis of Repeated Measured VAS in a Clinical Trial for Evaluating a New NSAID with GEE Method.
Hoi Jeong Lim, Yooni Kim, Young Bok Jung, Sang Cheol Seong, Jin Hwan Ahn, Kwon Jae Roh, Jung Man Kim, Byung Joo Park
J Prev Med Public Health. 2004;37(4):381-389. Published online November 30, 2014