0034-7450 0034-7450 S0034-74502022000200082 10.1016/j.rcp.2020.11.003 Peru 00 06 2022 00 06 2022 51 2 82 84 . 2020 49 178-86 2. 2017 45 145-56 3. 2020 13 131-9 4. 1998 2 a 5. 1996 169 622-30 6. 1984 144 247-55 7. 2017 80