2007-5057 2007-5057 S2007-50572020000300111 10.22201/facmed.20075057e.2020.35.20240 Peru Peru Peru 00 09 2020 00 09 2020 9 35 111 112 1 2013 88 10 10 1418-23 2 2013 346 4 4 2-4 3 2010 27 3 3 315-25