1. Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
2. Royal Canin Research Center; Aimargues; France
3. Waltham Centre for Pet Nutrition, Waltham-on-the-Wolds; Melton Mowbray; Leicestershire; United Kingdom
4. TCCI Consultancy BV; Utrecht; The Netherlands