TABLE 2.

Quality assessment of the experiments included in the studies.

Study (year)	1	2	3	4	5	6	7	8	9	10	Total
Liang et al. (1991)	+	-	+	NR	+	NR	-	+	NR	NR	4
Zhang et al. (2012)	+	-	+	NR	+	-	-	+	NR	NR	4
Fang et al. (2012)	+	+	+	NR	+	NR	-	+	NR	NR	5
Cui et al. (2018)	+	+	+	+	+	NR	-	+	NR	NR	6
Li et al. (2020)	+	+	-	+	+	NR	-	+	+	+	7
Sun et al. (2014)	+	+	+	+	+	+	-	+	+	+	9
Liu et al. (2019)	+	+	-	NR	+	+	-	+	+	NR	6
Ye et al. (2021)	+	+	-	+	+	NR	-	+	+	+	7
Wang et al. (2020b)	+	+	-	+	+	NR	-	+	+	+	7
Deng (2010)	+	NR	-	NR	+	-	-	-	NR	NR	2
Xia et al. (2021)	+	+	+	+	+	NR	-	+	+	NR	7
Wang (2013)	+	NR	+	NR	+	+	-	+	NR	NR	5
Peng et al. (2020)	+	+	+	NR	+	+	-	+	+	+	8

1: peer-reviewed publication; 2: statements describing control of temperature; 3: randomization to treatment group; 4: allocation concealment; 5: blinded assessment of outcome; 6: use of anesthetic had no apparent intrinsic myocardial preservation or neuroprotective effect; 7: use of animals with relevant comorbidities; 8: sample size calculation; 9: compliance with animal welfare regulations; 10: declared any potential conflict of interest; NR, not reported.