1. Medical Practice Evaluation Center Division of General Internal Medicine Massachusetts General Hospital 55 Fruit St Boston Massachusetts02114USA
2. Department of Medicine Harvard Medical School 25 Shattuck St Boston Massachusetts02115USA
3. Operations and Decision Technologies Kelley School of Business Indiana University 1309 E 10th St Bloomington Indiana47405USA
4. Department of Industrial and Operations Engineering University of Michigan 1205 Beal Ave Ann Arbor Michigan48109USA
5. Department of Ophthalmology and Visual Sciences University of Michigan Medical School 1000 Wall St Ann Arbor Michigan48105USA