- Correspondence to Dr Rebecca S French, Department of Social & Environmental Health Research, Faculty of Public Health & Policy, Centre for Sexual and Reproductive Health Research, London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London WC1H 9SH, UK;
- Received 5 January 2017
- Revised 13 June 2017
- Accepted 16 August 2017
- Published online 29 December 2017.
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