[1] Policlin Pablo Bermudez EsSalud, Otorhinolaryngol Serv, Lima, Peru
[2] Univ San Ignacio Loyola, Unite Revis Sistemat & Meta Anal URSIGET, Vicerrectorado Invest, Lima, Peru
[3] Univ San Ignacio Loyola, Unite Revis Sistemat & Meta Anal URSIGET, Vicerrectorado Invest, Av Fontana 550, La Molina 00012, Lima, Peru