Coronavirus Disease 2019 (COVID-19)

Not specified

• Pfizer Clinical Research Unit - Brussels — Brussels, Bruxelles-capitale, Région de, Belgium

• Children's Hospital Colorado: Inner City Asthma Consortium (ICAC) Site — Aurora, Colorado, United States
• Children's Hospital Colorado: Outcome Measures in Eosinophilic Gastrointestinal Disorders Across the Ages (OMEGA) Site — Aurora, Colorado, United States
• Children's National Medical Center: Inner City Asthma Consortium (ICAC) Site — Washington D.C., District of Columbia, United States
• Ann & Robert H. Lurie Children's Hospital of Chicago: Food Allergy Outcomes Related to White and African American Racial Differences (FORWARD) and Improving Technology-Assisted Recording of Asthma Control in Children (iTRACC) Site — Chicago, Illinois, United States

• Christchurch Clinical Studies Trust — Christchurch, New Zealand

• Belgorod State National Research University, Department of Hospital Therapy — Belgorod, Russia
• Ivanovo clinical hospital named after Kuvaevs/Polyclinic #10 — Ivanovo, Russia
• Kazan State Medical University, Department of Propedeutics of Internal Diseases named after prof. S.S. Zimnitsky — Kazan', Russia
• Kazan State Medical University/Department of Infectious Diseases — Kazan', Russia

• Research Site — Baoding, China
• Research Site — Beijing, China
• Research Site — Changsha, China
• Research Site — Chongqing, China

• St Vincent's Hospital, Sydney — Sydney, New South Wales, Australia
• Prince of Wales Hospital — Sydney, New South Wales, Australia
• Sydney Children's Hospital, Randwick — Sydney, New South Wales, Australia
• The Children's Hospital at Westmead — Sydney, New South Wales, Australia

• VA Boston Healthcare System Jamaica Plain Campus, Jamaica Plain, MA — Boston, Massachusetts, United States
• VA Puget Sound Health Care System Seattle Division, Seattle, WA — Seattle, Washington, United States

• Loma Linda University Health — Loma Linda, California, United States
• Cedars-Sinai Medical Center — Los Angeles, California, United States
• Children's Hospital Los Angeles — Los Angeles, California, United States
• Lucile Packard Children's Hospital Stanford — Palo Alto, California, United States

• Bayer — Whippany, New Jersey, United States