Using data from respondent-driven sampling studies to estimate the number of people who inject drugs: Application to the Kohtla-Järve region of Estonia

• Jiacheng Wu,

  Roles Formal analysis, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliation Department of Biostatistics, University of Washington, Seattle, WA, United States of America

  ⨯
• Forrest W. Crawford ,

  Roles Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Software, Supervision, Writing – original draft, Writing – review & editing

  * E-mail: forrest.crawford@yale.edu

  Affiliations Department of Biostatistics, Yale School of Public Health, New Haven, CT, United States of America, Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, United States of America, Yale School of Management, New Haven, CT, United States of America

  http://orcid.org/0000-0002-0046-0547

  ⨯
• Mait Raag,

  Roles Methodology, Validation, Writing – review & editing

  Affiliation Institute of Family Medicine and Public Health, University of Tartu, Tartu, Estonia

  ⨯
• Robert Heimer,

  Roles Investigation, Project administration, Resources, Supervision, Writing – review & editing

  Affiliation Department of Epidemiology of Microbial Disease and the Center for Interdisciplinary Research on AIDS, Yale School of Public Health, New Haven, CT, United States of America

  ⨯
• Anneli Uusküla

  Roles Funding acquisition, Investigation, Project administration, Supervision, Writing – review & editing

  Affiliation Institute of Family Medicine and Public Health, University of Tartu, Tartu, Estonia

  ⨯