Risk Factors for Loss to Follow-Up among People Who Inject Drugs in a Risk Reduction Program at Karachi, Pakistan. A Case-Cohort Study

• Rab Nawaz Samo ,

  * E-mail: drsamo1974@yahoo.com

  Affiliation Polio Eradication Initiative, World Health Organization, Larkana, Pakistan

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• Ajmal Agha,

  Affiliation Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan

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• Sharaf Ali Shah,

  Affiliation Bridge Consultants Foundation, Karachi, Pakistan

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• Arshad Altaf,

  Affiliation Bridge Consultants Foundation, Karachi, Pakistan

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• Ashraf Memon,

  Affiliation Sindh AIDS Control Program, Karachi, Pakistan

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• Meridith Blevins,

  Affiliation Vanderbilt Institute for Global Health & Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America

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• Han-Zhu Qian,

  Affiliation Vanderbilt Institute for Global Health & Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America

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• Sten H. Vermund

  Affiliation Vanderbilt Institute for Global Health & Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America

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