1. The Community Medicine Research Center and Institute of Public Health, National Yang-Ming University, Taipei, Taiwan; Department of Chinese Medicine, Taipei Hospital, Taiwan.
2. Department of Pediatrics, Taipei Hospital, Taiwan.
3. Department of Chest Medicine, Kinmen Hospital, Taiwan.
4. Department of Radiology, Taipei Hospital, Taiwan.
5. Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
6. The Community Medicine Research Center and Institute of Public Health, National Yang-Ming University, Taipei, Taiwan.