Perioperative Serum 25-Hydroxyvitamin D Levels as a Predictor of Postoperative Opioid Use and Opioid Use Disorder: a Cohort Study. (Pubmed Abstract) Authors Kim Y, Zhang F, Su K, LaRochelle M, Callahan M, Fisher D, Wharam JF, Asgari MM Abbreviation J Gen Intern Med Publication Date 2020-06-24