authors Kulik, Grace L Brown, Todd T Sun, Jing Hsu, Hsing-Yu Rudolph, Jacqueline Jiang, Yutong Kristine Erlandson, MD Piggott, Damani A Mehta, Shruti Walston, Jeremy D Kirk, Gregory
Keywords aging frailty functional impairment methadone opioid agonist therapy persons who inject drugs physical function