1. Midwest Center for Health Services and Policy Research, Hines VA Hospital, Hines, IL, USA
2. Center for Healthcare Studies, Division of General Internal Medicine, and the Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
3. Center for Pharmacoeconomic Research, Department of Pharmacy Practice, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
4. Department of Pharmacology, Boston University School of Medicine, Boston, MA, USA
5. Pfizer Global Research and Development, Eastern Point Road, Groton CT, USA