1. Department of Internal MedicineHebei Medical UniversityShijiazhuang 050017 Hebei People's Republic of China
2. Key Laboratory of Metabolic Diseases of Hebei ProvinceHebei Medical UniversityShijiazhuang 050017 Hebei People's Republic of China
3. Department of Critical Care MedicineFirst Hospital of QinhuangdaoQinhuangdao 066001 Hebei People's Republic of China
4. Department of Critical Care MedicineQinhuangdao Hospital of Traditional Chinese MedicineQinhuangdao 066006 Hebei People's Republic of China
5. Department of EndocrinologyHebei General HospitalShijiazhuang 050051 Hebei People's Republic of China