1. Dermatology Unit, Department of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.
2. Division of Dermatology, Department of Medicine, Faculty of Medicine, Allergy and Clinical Immunology Research Group, Chulalongkorn University, Bangkok, Thailand.
3. Division of Pharmaceutical Technology, Faculty of Pharmaceutical Science, Huachiew Chalermprakiet University, Samutprakarn, Thailand.
4. Division of Pharmacognosy, Faculty of Pharmaceutical Science, Huachiew Chalermprakiet University, Samutprakarn, Thailand.
5. Department of Pharmacology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.