[Limitations of observation].
Vandenbroucke
Jan P
JP
Leids Universitair Medisch Centrum, afd. Klinische Epidemiologie, Leiden. j.p.vandenbroucke@lumc.nl
D005260:Female; D006801:Humans; D015999:Multivariate Analysis; D019370:Observation; D010051:Ovarian Neoplasms / Q000601:surgery / Q000628:therapy*; D016032:Randomized Controlled Trials as Topic; D012107:Research Design