1. Department of MedicineStanford University School of MedicineStanford California
2. Department of MedicineUniversity of Pittsburgh Medical CenterPittsburgh Pennsylvania
3. Division of General Medical DisciplinesStanford University School of MedicineStanford California
4. Stanford Prevention Research CenterStanford University School of MedicineStanford California
5. Center for Population Health SciencesStanford University School of MedicineStanford California
6. Department of Otolaryngology–Head and Neck SurgeryStanford University School of MedicineStanford California