1 Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
2 Department of General Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan; Department of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Osteoporosis Prevention and Treatment Center, Chang Gung Memorial Hospital, Keelung, Taiwan; Community Medicine Research Center, Chang Gung Memorial Hospital, Keelung, Taiwan.
3 Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan; Department of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Osteoporosis Prevention and Treatment Center, Chang Gung Memorial Hospital, Keelung, Taiwan. Electronic address: arvin.sun@msa.hinet.net.