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False carbamazepine positives due to 10,11-dihydro-10-hydroxycarbamazepine breakdown in the GC/MS in

Johnson, Robert D. (Robert David), 1974-
Washington, D.C. : Federal Aviation Administration, Office of Aerospace Medicine, [2010] 2010

Gas chromatographic/mass spectrometric differentiation of atenolol, metoprolol, propranolol, and an

Washington, DC : Office of Aerospace Medicine, U.S. Dept. of Transportation, Federal Aviation Administration ; Springfield, Va. : National Technical Information Service [distributor], [2004] 2004

The LC/MS quantitation of vardenafil (LevitraŽ) in postmortem biological specimens final report

Johnson, Robert D. (Robert David), 1974-
Washington, D.C. : Federal Aviation Administration, Office of Aerospace Medicine ; Ft. Belvior, VA : Available to the public through the Defense Technical Information Center ; Springfield, Va. : Available to the public through the National Technical Information Service, 2006. 2006