Cornelius A Thiels assistant professor of health services research,
Elizabeth B Habermann professor of health services research,
W Michael Hooten professor of anesthesiology,
View ORCID ProfileMolly M Jeffery research associate and visiting fellow
Thiels C A, Habermann E B, Hooten W M, Jeffery M M.
Chronic use of tramadol after acute pain episode: cohort study
BMJ 2019; 365 :l1849
doi:10.1136/bmj.l1849
