0864-2141 0864-2141 S0864-21412022000100003 Peru Peru Peru 00 03 2022 00 03 2022 36 1 1 2019 33 4 4 37-49 2 2019 6 3 3 181-5 3 2015 4 2020 21 2020 2020 11 5 2020 24 5-16 6 2020 0 1-7 7 2020 84 3 3 367-76 8 2020 8 53 53 1-18 9 2019 0 1-5 10 2020 23 2 2 89-94