1. Department of Oncology Weihai Cental Hospital Weihai People's Republic of China
2. Department of Oncology Weihai Wendeng District People's Hospital Weihai People's Republic of China
3. Department of Oncology Weihai Wendeng District Zetou Township Health Center Weihai People's Republic of China
4. Department of Clinical Teaching Weihai Health School Weihai People's Republic of China