[1] Univ San Martin de Porres, Fac Med, Chiclayo, Peru
[2] Univ Nacl Daniel Alcides Carrion, Fac Med Humana, Pasco, Peru
[3] Red Latinoamericana Med Altitud Invest REDLAMTAI, Pasco, Peru
[4] Univ Continental, Sch Med, Lima, Peru
[5] Univ San Ignacio Loyola, Unidad Invest Generac & Sintesis Evidencias Salud, Lima, Peru
[6] Univ Ricardo Palma, Inst Invest Ciencias Biomed, Lima 15039, Peru
[7] Univ Tecnol Peru, Lima 15046, Peru
[8] Univ Cesar Vallejo, Escuela Med, Piura, Peru
[9] Hosp Reg Lambayeque, Oficina Epidemiol, Chiclayo, Peru