Harvard University - CAUSALab, Boston University - School of Public Health, Harvard University - CAUSALab, National and Kapodistrian University of Athens - Department of Hygiene, Epidemiology and Medical Statistics, National and Kapodistrian University of Athens - 4th Department of Internal Medicine, University of Bordeaux - CHU de Bordeaux, University of Bordeaux - Bordeaux Population Health Centre, Stichting HIV Monitoring, University of Amsterdam - Department of Infectious Diseases, Amsterdam Institute for Global Health and Development, McGill University - McGill University Health Centre, McGill University - McGill University Health Centre, Carlos III Institute of Health - National Center for Epidemiology, University of Milan - Clinic of Infectious Diseases and Tropical Medicine, University of Milan - Unit of Infectious Diseases, University of Paris - INSERM U1016, University of Paris - INSERM U1016, University of Calgary - Department of Medicine, University of Calgary, University of Bern - Department of Infectious Diseases, University of Bern - Institute of Social and Preventive Medicine, Yale University - School of Medicine, Yale University - Department of Internal Medicine, University College London - Institute for Global Health, National Institute for Health Research (NIHR) - Health Protection Research Unit in Blood Borne and Sexually Transmitted Infections, University of Barcelona - Hospital Clinic, University of Bristol - Department of Population Health Sciences, University of Bristol - Department of Population Health Sciences, University of Bristol, Harvard University - CAUSALab and Independent

Boston University - School of Public Health, Boston University - Boston Medical Center, Boston University - Boston Medical Center, Boston University - Boston Medical Center, Boston University - Boston Medical Center, Government of the State of Massachusetts - Department of Public Health, New York University (NYU) - Grossman School of Medicine, New York University (NYU) - Grossman School of Medicine, New York University (NYU) - Department of Population Health, University of Pittsburgh, Boston University - Department of Medicine and Boston Medical Center

Portland Psychotherapy Clinic, Research, and Training Center, Boston University - Clinical Addiction Research and Education (CARE) Unit, Ukrainian Institute on Public Health Policy, Life in Balance Psychotherapy Clinic, Saint Petersburg Pavlov State Medical University, Saint Petersburg Pavlov State Medical University, Boston University - Clinical Addiction Research and Education (CARE) Unit, Ukrainian Institute on Public Health Policy, V.M. Bekhterev National Medical Research Centre for Psychiatry and Neurology - Department of Addictions, Saint Petersburg Pavlov State Medical University, Saint Petersburg Pavlov State Medical University, Boston University - School of Public Health and Boston University Medical Center

University of Zurich - Epidemiology, Biostatistics and Prevention Institute, Boston University - School of Public Health, Harvard Pilgrim Health Care, University of Pennsylvania - Department of Biostatistics, Epidemiology, and Informatics, University of Waterloo - Department of Statistics and Actuarial Science, Fenway Community Health - The Fenway Institute, Harvard Pilgrim Health Care, Harvard Pilgrim Health Care and Harvard Pilgrim Health Care