0034-7523 0034-7523 S0034-75232023000400013 Ecuador Ecuador Ecuador Ecuador 00 12 2023 00 12 2023 62 4

1 2017 45 3 3 486-552 2 2018 8 1 1 66 3 2014 146 6 6 1575-84 4 2018 378 829-39 5 2018 378 819-28 6 2017 318 13 13 1233-40 7 2017 43 2 2 155-70 8 2011 364 26 26 2483-95 9 National Library of Medicine (US) 1976 10 1947 11 The Cochrane Collaboration 12 2011 343 13 2019 321 7 7 654-64 14 2014 40 12 12 1795-815 15 2011 364 26 26 2483-95 16 2004 350 22 22 2247-56 17 2014 370 18 18 1683-93 18 2014 370 17 17 1583-93 19 2013 11 68 20 2001 345 19 19 1368-77 21 2018 73 3 3 328-37 22 2018 378 2263-74 23 2017 43 2 2 155-70 24 2015 41 9 9 1549-60 25 O'Brien J 2014 29 6 6 213-7