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APA Citation
Free, C., Swinson, R., Potter, K., McCarthy, O., Knight, R., Baraitser, P., Hickson, F., French, R., Michie, S., Wellings, K., Palmer, M., & Bailey, J. (n.d.). p218 Safetxt: a randomised controlled trial of an intervention delivered by mobile phone messaging designed to reduce infection with chlamydia and gonorrhoea- recruitment methods. Sexually transmitted infections, 93, A87. http://access.bl.uk/ark:/81055/vdc_100137793209.0x000010