Sinusitis

• Department of Otolaryngology-Head and Neck Surgery clinics at UNC Hospitals — Chapel Hill, North Carolina, United States

• Harrisson Clinical Research Clinical Unit — München, Germany

• Upland ENT — Upland, California, United States
• Colorado ENT — Denver, Colorado, United States
• St. Elizabeth Medical Center — Brighton, Massachusetts, United States

Not specified

• University of Missouri, Department of Internal Medicine — Columbia, Missouri, United States

• IHA Ann Arbor Family Medicine — Ann Arbor, Michigan, United States
• IHA Family Medicine - Arbor Park — Ann Arbor, Michigan, United States
• IHA Internal Medicine - Domino's Farms — Ann Arbor, Michigan, United States
• IHA Brighton Family Care — Brighton, Michigan, United States

• St. Paul's Hospital Sinus Centre — Vancouver, British Columbia, Canada

• E.N.T. Clinic, St. Paul's Hospital — Vancouver, British Columbia, Canada

• Oregon Health & Science University — Portland, Oregon, United States

• Division of Allergy and Immunology, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University — Bangkok, Thailand