[1] Psychol & Hist, Ave Guaiba 3450, BR-91900420 Porto Alegre, RS, Brazil
[2] Univ Fed Rio Grande Sul UFRGS, Grad Program Psychiat Behav Sci, Rua Ramiro Barcelos 2400, BR-90035002 Porto Alegre, RS, Brazil
[3] Univ Estadual Campinas UNICAMP, Sch Med Sci, Dept Collect Hlth, Rua Tessalia Vieira Camargo 126, BR-13084971 Campinas, SP, Brazil
[4] Univ Illinois, Dept Kinesiol & Community Hlth, 1206 South Fourth St, Champaign, IL 61820 USA
[5] Fundacao Getulio Vargas, Sao Paulo Sch Business Adm, Ave 9 julho 2029,Edificio Fundacao Getulio Vargas, BR-01313902 Sao Paulo, SP, Brazil
[6] Univ Fed Rio Grande Sul UFRGS, Hosp Clin Porto Alegre HCPA, Dept Psychiat, Child & Adolescent Psychiat Div, Rua Ramiro Barcelos 2400, BR-90035002 Porto Alegre, RS, Brazil
[7] Hosp Clin Porto Alegre, Ctr Pesquisa Clin, Ave Protasio Alves 211,Sala 21603, BR-90035903 Porto Alegre, RS, Brazil