1. Center for Health Research; Geisinger Health System; Danville PA USA
2. Research Development and Dissemination; Sutter Health; San Franciso
3. Department of Otolaryngology Head and Neck Surgery and the Division of Allergy and Immunology; Department of Medicine; Northwestern University Feinberg School of Medicine; Chicago IL USA
4. Department of Otolaryngology/Head and Neck/Facial Plastic Surgery; Geisinger Health System; Danville PA USA
5. Department of Environmental Health Sciences; Johns Hopkins University Bloomberg School of Public Health; Baltimore MD USA