A patient activation intervention in primary care for patients with chronic pain on long term opioid therapy: results from a randomized control trial - Does, Monique B.; Adams, Sara R.; Kline-Simon, Andrea H.; Marino, Catherine; Charvat-Aguilar, Nancy; Weisner, Constance M.; Rubinstein, Andrea L.; Ghadiali, Murtuza; Cowan, Penney; Young-Wolff, Kelly C.; Campbell, Cynthia I. (BMC Health Services Research, 2024)