Table 4. The Newcastle–Ottawa Scale of included non-randomized control studies.

Author (Year) [Reference]	Selection	Comparability	Outcome	Overall
Navia et al. (2012) Navia et al. (2011)	4	2	2	8
Bisleri et al. (2016)	4	2	3	9
Galajda et al. (2002)	3	1	3	7
Patel et al. (2004)	3	0	2	5
Shapira et al. (2006b)	4	0	3	7
Bleiziffer et al. (2007) Bleiziffer et al. (2008)	4	2	3	9
Burris et al. (2008)	4	2	2	8
Kim et al. (2007)	4	0	3	7
Medalion et al. (2008)	4	1	2	7
Ito et al. (2009)	3	0	2	5
Ito et al. (2011a) Ito et al. (2011b)	3	1	1	5
Dimitrova et al. (2010)	4	0	2	6