[1] Univ Fed Rio Grande do Sul, Grad Program Biol Sci, Biochem, Porto Alegre, RS, Brazil
[2] Kings Coll London, Sch Biomed Engn & Imaging Sci, St Thomas Hosp, London SE1 7EH, England
[3] Univ Fed Rio Grande do Sul, Dept Biochem, Porto Alegre, RS, Brazil
[4] Univ Fed Rio Grande do Sul, Dept Pharmacol, Porto Alegre, RS, Brazil
[5] Univ Fed Rio Grande do Sul, Grad Program Biol Sci Pharmacol & Therapeut, Porto Alegre, RS, Brazil