Use of prescribed opioids before and after bariatric surgery: prospective evidence from a U.S. multicenter cohort study

Wendy C. King, Jia Yuh Chen, Steven H. Belle, Anita P. Courcoulas, Gregory F. Dakin, David R. Flum, Marcelo W. Hinojosa, Melissa A. Kalarchian, James E. Mitchell, Walter J. Pories, Konstantinos Spaniolas, Bruce M. Wolfe, Susan Z. Yanovski, Scott G. Engel, Kristine J. Steffen