1988-348X 1988-348X S1988-348X2020000100017 Ecuador 00 00 2020 00 00 2020 14 1 2019 13 1 1 OPS/OMS Ecuador 2018 Pan American Health Organization 2013 2016 20 4 4 Asociación Chilena de educación en enfermería 2016 School of nursing University of Michigan World Health Organization 2016 2010 2015 13 55 World Health Organization 2013