Respiratory Hypersensitivity

• Beijing Shijitan Hospital, Capital Medical University — Beijing, Beijing Municipality, China
• Beijing Tongren Hospital, Capital Medical University — Beijing, Beijing Municipality, China
• Beijing Youan Hospital, Capital Medical University — Beijing, Beijing Municipality, China
• Peking University Third Hospital — Beijing, Beijing Municipality, China

• October 6 university hospital outpatient chest department — Giza, Cairo Governorate, Egypt

• Multiple primary care sites — São Carlos, São Paulo, Brazil
• Multiple primary care sites — São Paulo, Brazil

• Hospital Virgen del Rocio — Seville, Spain

• Huiying Wang — Hangzhou, Zhejiang, China

Not specified

• Multiple primary care sites — São Carlos, São Paulo, Brazil
• Multiple primary care sites — São Paulo, Brazil

• School of Public Health, Lanzhou University — Lanzhou, Gansu, China

• Medical University of Vienna — Vienna, State of Vienna, Austria

• Medical University of Vienna — Vienna, Austria