Department of Dermatology, Faculty of Medicine Siriraj Hospital, Mahidol University has applied for GA2LEN Urticaria Center of Reference and Excellence (GA2LEN UCARE), which is endorsed by GA2LEN (The Global Allergy and Asthma European Network). GA2LEN is a Network of Excellence of the leading European clinical and research facilities in the field of allergology and asthma. Its founding partners include the European Academy of Allergy and Clinical Immunology (EAACI) and the organization representing European patients with allergies and asthma (EFA). The certified centers are recognized globally as the Urticaria Center that enhances its capacity to manage patients better and increase disease awareness through research, education and advocacy activities. Siriraj Urticaria Clinic has been externally audited by Professor Marcus Maurer on September 12nd, 2018 and fulfilled all the criteria required.