Papers: 10.1186/s13643-015-0129-9

https://doi.org/10.1186/s13643-015-0129-9

Hard-to-reach populations of men who have sex with men and sex workers: a systematic review on sampling methods

Cited by: 21
Author(s): Ana B. Barros, Sónia Dias, Maria do Rosário Oliveira Martins
Published: about 11 years ago

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