Introduction to observational studies: part 2.
Private practice, Corfu, Greece; visiting assistant professor, Department of Orthodontics and Dentofacial Orthopedics, Faculty of Medicine, University of Bern, Bern, Switzerland.
Nikolaos
N
Pandis
D015982:Bias; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D064887:Observational Studies as Topic / Q000706:statistics & numerical data; D009970:Orthodontics; D016032:Randomized Controlled Trials as Topic; D012107:Research Design / Q000706:statistics & numerical data; D012307:Risk Factors; D009626:Terminology as Topic; D016896:Treatment Outcome