Longitudinal designs and their statistical analysis in pediatric pulmonary research.
Department of Biostatistics, University of North Carolina, Chapel Hill 27599-7400.
R W
RW
Helms
D002648:Child; D006801:Humans; D007223:Infant; D008137:Longitudinal Studies; D008171:Lung Diseases / Q000453:epidemiology*; D012107:Research Design