Economic Burden of the Inadequate Management of Allergic Rhinitis and Urticaria in Asian Countries Based on the GA2LEN Model by Kulthanan, Kanokvalai, Chusakul, Supinda, Recto, Marysia Tiongco, Gabriel, Ma. Teresita, Aw, Derrick Chen-Wee, Prepageran, Narayanan, Wong, Alson, Leong, Jern Lin, Foong, Henry, Quang, Vo Thanh, Zuberbier, Torsten