1. The State Key Clinical Specialty in Allergy, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
2. Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.
3. The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China.
4. Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.