1. Radiology Division, Ribeirão Preto Medical School; University of São Paulo; Brazil
2. Dermatology Division, Ribeirão Preto Medical School, University of São Paulo, Brazil
3. Department of Radiology, Saint-Antoine Hospital; University Paris VI; France
4. Physics Department, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto; University of São Paulo; Brazil