1 Department of Pediatric Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan; Department of Oral Pathology and Oral Diagnosis, Chang Gung Memorial Hospital, Taipei, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
2 Department of Pathology, Taiwan Adventist Hospital, Taipei, Taiwan; Department of Pathology, National Cheng-Kung University Hospital, Tainan, Taiwan.
3 Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Dentistry, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
4 Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Dentistry, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Dentistry, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan. Electronic address: cpchiang@ntu.edu.tw.