International Journal of Molecular Sciences Article Low Levels of IgG Recognizing the α-1-Antitrypsin Peptide and Its Association with Taiwanese Women with Primary Sjögren's Syndrome Yu-Sheng Chang 1,2, Chih-Hong Pan 3,4, Che-Chang Chang 5 ID , Kai-Leun Tsai 1, Han-Wen Chou 6, Jin-...