Bartoli, MD A, Michna, MD E, He, PhD E, Wen, PhD W. Pain intensity and interference with functioning and well-being in subgroups of patients with chronic pain treated with once-daily hydrocodone tablets. J of Opioid Management [Internet]. 2015 Nov. 1 [cited 2024 May 2];11(6):519-33. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/245