Imai, S. “Serum Alpha 1 Protease Inhibitor Levels in Patients With Chronic Idiopathic Urticaria”. Acta Dermato-Venereologica 73, no. 1 (February 1, 1993): 10–11. Accessed May 30, 2026. https://medicaljournalssweden.se/actadv/article/view/16452.