1. From the Endocrinology and Nutrition Department, Germans Trias i Pujol University Hospital, Universitat Auto`noma de Barcelona, Badalona, Spain; the
2. Department of Vitreous and Retina Surgery, Centro de Oftalmologi´a Barraquer, Universitat Auto`noma de Barcelona, Barcelona, Spain; the
3. Department of Biochemistry and Molecular Biology and IRB (Institute for Research in Biomedicine), Universitat de Barcelona, Barcelona, Spain; and the
4. Department of Medicine and Surgery, School of Veterinary Medicine, Universitat Auto`noma de Barcelona, Bellaterra, Spain.