0034-7434 0034-7434 S0034-74342017000300193 10.18597/rcog.3071 USA USA Colombia Switzerland Switzerland 00 09 2017 00 09 2017 68 3 193 201

1 World Health Organization 2 World Health Organization 3 World Health Organization 4 United Nations 5 World Health Organization 6 World Health Organization 2015 7 World Health Organization 8 2017 pii sextrans-2016 9 Avenir Health 10