1. Department of Central Lab, Weihai Municipal Hospital, Cheeloo College of Medicine, Shandong University, Weihai, Shandong, 264200, PR China
2. Department of Medical Laboratory Sciences, Weifang Medical University, Weifang, Shandong, 261000, PR China
3. Department of Clinical Lab, Yantai Laiyang Central Hospital, Yantai, Shandong, 264200, PR China