This paper is in the following e-collection/theme issue:

Internet-based Survey & Research Methodology 


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Tweetations for "Bias in Online Recruitment and Retention of Racial and Ethnic Minority Men Who Have Sex With Men" in the last 6 months

Patrick S. Sullivan, Christine M. Khosropour, Nicole Luisi, Matthew Amsden, Tom Coggia, Gina M. Wingood, Ralph J. DiClemente
J Med Internet Res 2011 (May 13); 13(2):e38 

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