1. Heart Center, Cheng Hsin General Hospital , No. 45, Cheng Hsin St, Beitou , Taipei, 112 Taiwan, Republic of China
2. School of Medicine, Institute of Microbiology and Immunology, National Yang Ming Chiao Tung University , Taipei, Taiwan , Republic of China
3. Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University , Taipei, Taiwan , Republic of China
4. Faculty of Medicine, National Defense Medical Center , No. 155, Sec. 2, Linong St., Beitou Dist., Taipei City, 112, Taiwan , Republic of China