1. Medical College of Nantong University, Nantong, Jiangsu, China
2. The Sixth People’s Hospital of Nantong, Nantong, Jiangsu, China
3. Department of Infection Control, The Sixth People’s Hospital of Nantong, Nantong, Jiangsu, China
4. Department of Nursing, The Third Hospital Affiliated to Nantong University, Nantong, Jiangsu, China.