1. Endocrinology Division and2Post Graduation Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; and the
2. Endocrinology Division and
3. Pathology Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil;
4. Post Graduation Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; and the
5. Cornea Bank, Hospital Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, RS, Brazil.