Johannessen, Ane; Verlato, Guiseppe; Benediktsdottir, Bryndis; Forsberg, Bertil; Franklin, Karl; Gíslason, Thorainn; Holm, Mathias; Janson, Christer; Jögi, Rain; Lindberg, Eva; Macsali, Ferenc; Omenaas, Ernst; Gomez Real, Francisco; Saure, Eirunn Waatevik; Schlünssen, Vivi; Sigsgaard, Torben; Skorge, Trude Duelien; Svanes, Cecilie; Torén, Kjell; Waatevik, Marie Johanne; Nilsen, Roy Miodini; de Marco, Roberto (Peer reviewed; Journal article, 2014-04-16)
Background: Selection bias is a systematic error in epidemiologic studies that may seriously distort true measures of associations between exposure and disease. Observational studies are highly susceptible to selection ...