[1] Pontificia Univ Catolica Chile, Dept Family Med, Santiago, Chile
[2] Pontificia Univ Catolica Chile, Dept Gastroenterol, Santiago, Chile
[3] Pontificia Univ Catolica Chile, Dept Hlth Sci, 4860 Vicuna Mackenna Ave, Santiago, Chile
[4] Pontificia Univ Catolica Chile, Dept Publ Hlth, Santiago, Chile
[5] Fdn Adv Int Med Educ & Res, Philadelphia, PA USA
[6] Drexel Univ, Coll Med, Dept Emergency Med, Philadelphia, PA USA
[7] Univ Fed Ceara, Fortaleza, Ceara, Brazil
[8] Tecnol Monterrey, Sch Med, Monterrey, Nuevo Leon, Mexico
[9] Univ Peruana Cayetano Heredia, Sch Med, Lima, Peru
[10] Univ La Sabana, Dept Med Educ, Cundinamarca, Colombia
[11] Argentinean Paediat Soc, Evaluat Profess Board, Buenos Aires, DF, Argentina
[12] Pontificia Univ Catolica Chile, Fac Med, Santiago, Chile