1Division of General Internal Medicine and Geriatrics, Section of Addiction Medicine, Oregon Health & Science University, Portland, OR, United States of America; Central City Concern, Portland, OR, United States of America. Electronic address: chanbri@ohsu.edu.
2Division of General Internal Medicine and Geriatrics, Section of Addiction Medicine, Oregon Health & Science University, Portland, OR, United States of America.
3Boulder Care, Portland, OR, United States of America.
4School of Public Health, Oregon Health & Science University and Portland State University, Portland, OR, United States of America.
5Division of General Internal Medicine and Geriatrics, Section of Addiction Medicine, Oregon Health & Science University, Portland, OR, United States of America; School of Public Health, Oregon Health & Science University and Portland State University, Portland, OR, United States of America.
6Boulder Care, Portland, OR, United States of America; Department of Family Medicine and Community Health, UMass Chan Medical School, Worcester, MA, United States of America.