1 Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. Electronic address: mongkhon.som@mahidol.ac.th.
2 Department of Pharmacy, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
3 Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.