1. Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan. (F.-E.M.).
2. Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. (F.-E.M.).
3. Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan. (P.-L.H.).