Clinical and Biomedical Research, Vol 30, Iss 1 (2010) Clinical & Biomedical Research; Vol. 30 No. 1 (2010): Revista HCPA Clinical and Biomedical Research; v. 30 n. 1 (2010): Revista HCPA Clinical and Biomedical Research Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Clinical & Biomedical Research; v. 30, n. 1 (2010): Revista HCPA Clinical and Biomedical Research; v. 30, n. 1 (2010): Revista HCPA Repositório Institucional da UFRGS