1. Department
of Nutritional and Physiological Chemistry, University of Vienna, A-1090 Vienna, Austria
2. Institute
of Pharmacology and Toxicology, University of Veterinary Medicine, A-1210 Vienna, Austria
3. NIP Product
and
Technology Development − HNH, DSM Nutritional Products Ltd, CH-4303 Kaiseraugst, Switzerland
4. Sight and Life, CH-4303 Kaiseraugst, Switzerland