1. Department of Clinical Pharmacology, Netherlands Cancer Institute, Amsterdam, the Netherlands
2. Amgen Inc., 98119 Seattle, WA
3. University of Washington, Seattle WA 98195‐7630, USA
4. Mahidol‐Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
5. Pfizer Worldwide Research and Development, San Diego, CA 92121
6. US Public Health Service, Epidemiology Branch, Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20892, USA