1. Stoecker & Associates, Rolla, Missouri
2. Stoecker & Associates, Rolla, Missouri2University of Missouri School of Medicine, Columbia
3. Department of Dermatology, University of Missouri School of Medicine, Columbia
4. Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City
5. Division of Animal Sciences, University of Missouri, Columbia
6. Stoecker & Associates, Rolla, Missouri3Department of Dermatology, University of Missouri School of Medicine, Columbia