Feely Molly A, Havyer Rachel D A, Lapid Maria I, Swetz Keith M
Department of Medicine, Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA.
J Pain Symptom Manage. 2013 May;45(5):934-8. doi: 10.1016/j.jpainsymman.2012.04.004. Epub 2012 Aug 24.