[1] Univ Fed Rio Grande do Sul, Lab Evolucao Humana & Mol, Dept Genet, Inst Biociencias, BR-90046900 Porto Alegre, RS, Brazil
[2] UCL, Dept Biol, Galton Lab, London WC1E 6BT, England
[3] Pontificia Univ Catolica Rio Grande do Sul, Lab Biol Genom & Mol, Fac Biociencias, Porto Alegre, RS, Brazil