[1] Univ Nacl Altiplano, Fac Med Humana, Puno 21001, Peru
[2] Univ Nacl Altiplano, Fac Enfermeria, Puno 21001, Peru
[3] Univ Peruana Cayetano Heredia, Proyecto INSIGHT, Lima 15102, Peru
[4] Univ Peruana Union, Faultad Ciencias Salud, Juliaca 21100, Peru
[5] Univ San Martin Porres, Ctr Invest Educ Med CIEM FMH, Lima 15011, Peru
[6] Univ Nacl San Agustin Arequipa, Fac Med, Arequipa 04000, Peru
[7] Univ Nacl San Antonio Abad Cusco, Fac Enfermeria, Cuzco 08003, Peru
[8] Consejeria Salud Cantabria, Serv Cantabro Salud, Santander 39011, Spain
[9] Fdn Rioja Salud, Ctr Nacl Documentac Bioet CNB FRS, C Piqueras 98, Logrono 26006, Spain
[10] Univ Granada, Dept Estadist & Invest Operat, Melilla 52005, Spain
[11] Univ Europea Atlantico, Fac Ciencias Salud, Santander 39011, Spain
[12] Univ Int La Rioja, Fac Ciencias Salud, Logrono 26006, Spain
[13] Ctr Invest Biomed La Rioja CIBIR FRS, Plataforma Bioet & Educ Med, Calle Piqueras 98, Logrono 26006, Spain