[1] Hosp Univ Valle Cali, Unidad Cuidado Intens, Cali, Colombia
[2] Univ Libre, Dept Epidemiol, Cali, Colombia
[3] Univ Piloto, Dept Docencia Univ, Bogota, Colombia
[4] Inst Nacl Salud, Bogota, Colombia
[5] Grp Interdisciplinario Invest Epidemiol & Salud Pu, Cali, Colombia
[6] Hosp Univ Valle, Cl 5 36-00 Sindicato, Cali, Valle Del Cauca, Colombia