Darney Blair G, Powell Bill, Andersen Kathyrn, Baum Sarah E, Blanchard Kelly, Gerdts Caitlin, Montagu Dominic, Chakraborty Nirali M, Kapp Nathalie
Oregon Health & Science University, Portland, Oregon, USA.
Instituto Nacional de Salud Publica, Centro de Investigacion en Salud Poblacional, Cuernavaca, Mexico.
BMJ Sex Reprod Health. 2018 May 7;44(3):159-60. doi: 10.1136/bmjsrh-2018-200060.