1. Jiangsu Food and Pharmaceutical Science College, Huai'an Jiangsu P. R. China
2. Tongji University School of Medicine Shanghai P. R. China
3. Lianshui County People's Hospital Huai'an Jiangsu P. R. China
4. Department of Respiratory Medicine Huai'an Second People's Hospital and The Affiliated Huai'an Hospital of Xuzhou Medical University Huai'an Jiangsu P. R. China
5. Department of Respiratory Medicine The Affiliated Huai'an No. 1 People's Hospital of Nanjing Medical University Huai'an Jiangsu P. R. China