Affiliation: | 1. Universidade do Rio Grande do Sul, , Porto Alegre, Rio Grande do Sul, Brazil;2. Miraca Research Institute, Miraca Life Sciences, , Irving, TX, USA;3. University of Texas Southwestern Medical Center, , Dallas, TX, USA;4. Portland VA Medical Center, , Portland, OR, USA;5. Oregon Health & Science University, , Portland, OR, USA;6. Dallas VA Medical Center, , Dallas, TX, USA |