1. a Division of Clinical Pharmacology, Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
2. b Department of Internal Medicine, Postgraduate School in Oncology, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
3. c Utrecht University, Faculty of Science, Department of Pharmaceutical Sciences, Section of Biomedical Analysis, Division of Drug Toxicology, Utrecht, The Netherlands