Missing data? Plan on it!
Palmer
Raymond F
RF
Department of Family and Community Medicine, University of Texas Health Science Center, San Antonio, Texas 78284, USA. palmerr@uthscsa.edu
Royall
Donald R
DR
D000367:Age Factors; D000368:Aged; D000375:Aging; D006801:Humans; D008137:Longitudinal Studies / Q000379:methods*; D015233:Models, Statistical; D012107:Research Design