1. Department of Medicine , University of Pittsburgh School of Medicine , 200 Lothrop Street 9 South , Pittsburgh, PA 15213 , USA
2. Professor of Medicine, Department of Medicine , University of Pittsburgh School of Medicine , Pittsburgh, PA , USA
3. Assistant Professor of Medicine, Department of Medicine , Medical College of Wisconsin , Milwaukee, WI , USA
4. Center for Research on Healthcare Data Center, Division of General Internal Medicine , University of Pittsburgh , Pittsburgh, PA , USA
5. VA Pittsburgh Healthcare System, Department of Medicine , Pittsburgh, PA , USA
6. Clinical Instructor in Medicine, Department of Medicine , University of Pittsburgh School of Medicine , Pittsburgh, PA , USA