[1] Hosp Moinhos de Vento, Res Projects Off, Porto Alegre, RS, Brazil
[2] Univ Barcelona, Fac Med & Hlth Sci, Dept Med, Barcelona, Spain
[3] Univ Fed Minas Gerais, Fac Med, Belo Horizonte, MG, Brazil
[4] Columbia Univ, Vagelos Coll Phys & Surg, New York, NY USA