C. Sakurai Kimura, Postdoctoral Fellow, Stanford University, Stanford, California, UNITED STATES|C. Nahas, V. Lacerda Ribeiro, E. Vieira Silva-Filho, S. Nahas, Professor of Surgery, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, BRAZIL|C. Kin, M. Khan, Assistant Professor, Stanford University School of Medicine, Stanford, California, UNITED STATES|