Kulik, Grace L and Hsu, Hsing-Yu and Rudolph, Jacqueline and Jiang, Yutong and Erlandson, Kristine M and Piggott, Damani A and Mehta, Shruti and Walston, Jeremy D and Kirk, Gregory and Brown, Todd T and Sun, Jing (2026) The association of methadone use with physical function and frailty among persons who inject drugs. Addiction , 121 , (5) , pp. 1217-1226.