Commentary: Three worlds collide: Berkson's bias, selection bias and collider bias.

Neil Pearce ; Lorenzo Richiardi; (2014) Commentary: Three worlds collide: Berkson's bias, selection bias and collider bias. International journal of epidemiology, 43 (2). pp. 521-524. ISSN 0300-5771 DOI: 10.1093/ije/dyu025