No Increased Risk of Cancer after Coal Tar Treatment in Patients with Psoriasis or Eczema  Judith H.J. Roelofzen, Katja K.H. Aben, Ursula T.H. Oldenhof, Pieter-Jan Coenraads, Hans A. Alkemade, Peter C.M. van de Kerkhof, Pieter G.M. van der Valk, Lambertus A.L.M. Kiemeney  Journal of Investigative Dermatology  Volume 130, Issue 4, Pages 953-961 (April 2010) DOI: 10.1038/jid.2009.389 Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Process of updating personal data and vital status of patients in the cohort. CBG, Central Bureau of Genealogy; MPRD, municipal personal records database. Journal of Investigative Dermatology 2010 130, 953-961DOI: (10.1038/jid.2009.389) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions