1. Department of Medical Research, Hualien Tzu Chi Hospital , Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Chung-Yang Rd, Hualien City 970, Taiwan
2. Department of Chemistry, National Taiwan Normal University , Taipei 116, Taiwan
3. Tzu-Chi University of Science and Technology , No. 880, Sec. 2, Chien-kuo Rd, Hualien City 970, Taiwan