title: Fentanyl-Norfentanyl Concentrations During Transdermal Patch Application: LC-MS-MS Urine Analysis.
authors.affiliation: Department of Anesthesiology, Louisiana State University Health Science Center, 1542 Tulane Avenue, New Orleans, LA 70112, USA.
authors.forename: Xiulu
authors.initials: X
authors.lastname: Ruan
authors.affiliation: Department of Anesthesiology, University of Michigan Health System, Back & Pain Center, 325 E. Eisenhower Parkway, Suite 100, SPC 5721, Ann Arbor, MI 48108, USA.
authors.forename: Srinivas
authors.initials: S
authors.lastname: Chiravuri
authors.affiliation: Department of Anesthesiology, Louisiana State University Health Science Center, 1542 Tulane Avenue, New Orleans, LA 70112, USA.
authors.forename: Alan D
authors.initials: AD
authors.lastname: Kaye
mesh_terms: D002853:Chromatography, Liquid; D005283:Fentanyl / Q000031:analogs & derivatives; D053719:Tandem Mass Spectrometry; D057968:Transdermal Patch
chemical_list: C080127:norfentanyl; D005283:Fentanyl