Smith, C.,Ngo, T. D.,Gold, J.,Edwards, P.,Vannak, U.,Sokhey, L.,Machiyama, K.,Slaymaker, E.,Warnock, R.,McCarthy, O.,Free, C.. Effect of a mobile phone-based intervention on post-abortion contraception: a randomized controlled trial in Cambodia. Bull World Health Organ. 2015. 93:842-50a