Accelerated tryptic digestion of proteins in plasma for absolute quantitation using a protein internal standard by liquid chromatography/tandem mass spectrometry
1. Covance Laboratories, Inc., Bioanalytical Chemistry, 3301 Kinsman Boulevard, Madison, WI 53704, USA;2. Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin‐Madison, 777 Highland Ave, Madison, WI 53705, USA