Table 2.

Evaluation of literature quality.

Authors	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	Total scores
Jiang et al. [12]	1	1	1	1	1	0	1	0	6
Bufe et al. [13]	1	1	1	1	1	1	1	1	8
Pu et al. [14]	1	1	1	1	1	1	1	1	8
Laufer-Perl et al. [15]	1	1	1	1	1	1	0	1	7
Yang et al. [16]	1	1	1	1	1	1	1	0	7
Zheng and Cai [17]	1	1	0	1	1	0	1	1	6
Azzalini et al. [18]	1	1	1	1	1	1	1	1	8
Naganuma et al. [19]	1	1	1	1	1	0	1	1	7
Faridi et al. [20]	1	1	1	1	1	1	1	1	8
Malik et al. [21]	1	1	1	1	1	1	1	1	8
Charalambous et al. [22]	1	1	1	1	1	1	1	1	8