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	Hospital:	HUST-Union Hospital	HUST-Liyuan Hospital
AND OR	Age:	Less than 40 years old	40 to 60 years old	Over 60 years old
AND OR	Gender:	Male	Female
AND OR	SARS-CoV-2 nucleic acids:	Positive	Negative
AND OR	Computed tomography (CT):	Positive	Negative	N/A
AND OR	Morbidity outcome:	Critically ill	Severe	Regular
		Mild	Suspected	Control
AND OR	Mortality outcome:	Cured	Deceased	Unknown