2077-2874 2077-2874 S2077-28742020000200212 Peru 00 06 2020 00 06 2020 12 2 212 216

1 2013 74 3 3 231-6 2 2017 23 9 9 626-31 3 2017 19 ^s2 ^s2 2 4 2010 3 2 2 83-7 5 2015 83 3 3 265-70 6 2016 58 589-91 7 2014 31 4 4 716-20 8 2012 1 2 2 82-9