The article ''Determination of the absolute oral bioavailability of niraparib by simultaneous administration of a 14C-microtracer and therapeutic dose in cancer patients'', written by L. van Andel, H. Rosing, Z. Zhang, L. Hughes, V. Kansra, M. Sanghvi, M. M. Tibben, A. Gebretensae, J. H. M. Schellens and J. H. Beijnen, was originally published electronically on the publisher's internet portal (currently SpringerLink) on 17th October 2017 without open access.