About the Authors
Ross University School of Veterinary Medicine, St. Kitts, West Indies
Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: PRT. Analyzed the data: PRT KK MM NR. Contributed reagents/materials/analysis tools: PRT KK MM NR. Wrote the paper: PRT. Constructed database: KK MM NR.