[1
]
Department of Anaesthesiology, Second Affiliated Hospital of Anhui Medical University,
Hefei, Anhui, China.
[2
]
Department of Occupational and Environmental Health, School of Public Health, Anhui
Medical University, Hefei, Anhui, China; The Teaching Centre for Preventive Medicine,
School of Public Health, Anhui Medical University, Hefei, Anhui, China.
[3
]
Department of Food and Nutrition Hygiene, School of Public Health, Anhui Medical University,
Hefei, Anhui, China.
[4
]
Department of Anaesthesiology, Second Affiliated Hospital of Anhui Medical University,
Hefei, Anhui, China. Electronic address: hsf77@163.com.