About the Authors
VA Salt Lake City Health Care System and University of Utah, Salt Lake City, Utah, United States of America
Department of Veterans Affairs Pharmacy Benefit Management Services, Hines, Illinois, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BH MJ MR MN AG MS. Analyzed the data: MJ BH. Wrote the paper: BH MJ MR MN AG MS.