Volume 49, Issue 6, Pages 1044-1050 (June 2006)
Paula M.J. Moonen, Pim Peelen, Lambertus A.L.M. Kiemeney, Mathilde E. Boon, Jack A. Schalken, J. Alfred Witjes
Accepted 23 January 2006 published online 14 February 2006.
Editorial Comment by H. Van der Poel
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