1. Department of Surgery, VU University Medical Center, Amsterdam, Netherlands
2. Nutricia Research, Utrecht, Netherlands
3. Nutrition and Pharmacology Group, Division of Human Nutrition, Wageningen University, Wageningen, Netherlands
4. Department of Clinical Chemistry, VU University Medical Center, Amsterdam, Netherlands
5. ATAL-Medial Diagnostische Centra, Hoofddorp, Netherlands
6. Department of Surgery, Spaarne Gasthuis, Haarlem, Netherlands
7. NUTRIM School for Nutrition, Toxicology, and Metabolism, Maastricht University, Maastricht, Netherlands