1. Department of Medical Oncology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
2. Department of Emergency, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
3. Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka 804‑8550, Japan
4. Graduate School, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China