1. Department of Medicine, Division of Hospital MedicineStanford UniversityStanfordCalifornia
2. Division of Pulmonary and Critical Care MedicineUniversity of CaliforniaSan FranciscoCalifornia
3. Division of Hospital MedicineUniversity of CaliforniaSan FranciscoCalifornia
4. Division of Hospital MedicineSan Francisco Veterans Affairs Medical CenterSan FranciscoCalifornia