Including Online-Recruited Seeds: A Respondent-Driven Sample of Men Who Have Sex With Men

Nathan John Lachowsky   ^{1, 2} , PhD ;   Allan Lal   ¹ , BA (Hons) ;   Jamie I Forrest   ³ , MPH ;   Kiffer George Card   ^{1, 4} , BS ;   Zishan Cui   ¹ , MSc ;   Paul Sereda   ¹ , BA (Hons) ;   Ashleigh Rich   ⁴ , MPH ;   Henry Fisher Raymond   ^{5, 6} , PhD ;   Eric A Roth   ^{7, 8} , PhD ;   David M Moore   ^{1, 2} , MD ;   Robert S Hogg   ^{1, 4} , PhD

¹ British Columbia Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada

² Division of AIDS, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada

³ School of Population and Public Health, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada

⁴ Faculty of Health Science, Simon Fraser University, Burnaby, BC, Canada

⁵ Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, United States

⁶ San Francisco Department of Public Health, San Francisco, CA, United States

⁷ Department of Anthropology, Faculty of Social Science, University of Victoria, Victoria, BC, Canada

⁸ Centre for Addictions Research British Columbia, University of Victoria, Victoria, BC, Canada