Case-control versus cohort studies in the investigation of childhood cancer.
Bell
Claire L
CL
Sir James Spence Institute of Child Health, University of Newcastle upon Tyne, Royal Victoria Infirmary, UK.
Hammal
Donna M
DM
D016022:Case-Control Studies; D002648:Child; D015331:Cohort Studies; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology*; D012107:Research Design