James A. Havel

Pharmacokinetics and physiologic effects of intramuscularly administered xylazine hydrochloride-ketamine hydrochloride-butorphanol tartrate alone or in combination with orally administered sodium salicylate on biomarkers of pain in Holstein calves following castration and dehorning

Sarah L. Baldridge, Johann F. Coetzee, Steven S Dritz et al. · American Journal of Veterinary Research · 2011 · 57 citations · Full text

Development and validation of an LC/MS/MS method for the determination of l-hyoscyamine in human plasma

Allan Xu, James A. Havel, K. Linderholm et al. · Journal of Pharmaceutical and Biomedical Analysis · 1995 · 40 citations

Biochemistry, Medicine, Human Plasma +7

Determination of nicotine and cotinine in human plasma by liquid chromatography-tandem mass spectrometry with atmospheric-pressure chemical ionization interface

Allan Xu, Lana L. Peng, James A. Havel et al. · Journal of Chromatography B Biomedical Sciences and Applications · 1996 · 40 citations

Chemical Measurement, Gas Chromatography, Medicine +10

Effects of sample handling methods on substance P concentrations and immunoreactivity in bovine blood samples

R. A. Mosher, Johann F. Coetzee, Portia S. Allen et al. · American Journal of Veterinary Research · 2014 · 33 citations · Full text

Plasma pharmacokinetics of oral chlortetracycline in group fed, ruminating, Holstein steers in a feedlot setting

James B. Reinbold, Johann F. Coetzee, Ronette Gehring et al. · Journal of Veterinary Pharmacology and Therapeutics · 2009 · 17 citations