Table 1.

Database information and the corresponding number of data.

Nr.	Reference	Nr. of Data	% of Proportion	Nr.	Reference	Nr. of Data	% of Proportion
1	Aslani et al. [62]	12	2.8	20	Lin [63]	12	2.8
2	Bergmann [64]	4	0.9	21	Matsui & Tsuda [65]	6	1.4
3	Bridge [66]	1	0.2	22	Mursi & Uy [67]	4	0.9
4	Chapman & Neogi [68]	2	0.5	23	Sakino et al. [56]	48	11.4
5	Chen et al. [69]	4	0.9	24	Sakino et al. [70]	36	8.5
6	Ding et al. [60]	5	1.2	25	Schneider [26]	11	2.6
7	Du et al. [55]	14	3.3	26	Shakir-Khalil & Mouli [71]	14	3.3
8	Dundu [72]	27	6.4	27	Shakir-Khalil & Zeghiche [73]	1	0.2
9	Fong et al. [74]	1	0.2	28	Tao et al. [75]	2	0.5
10	Furlong [76]	5	1.2	29	Tomii & Sakino [77]	8	1.9
11	Ghannam et al. [78]	24	5.7	30	Uy [79]	18	4.3
12	Grauers [80]	18	4.3	31	Varma [81]	4	0.9
13	Han [82]	66	15.6	32	Vrcelj & Uy [83]	8	1.9
14	Han & Yang [84]	4	0.9	33	Xiong et al. [85]	15	3.6
15	Han & Yao [58]	34	8.1	34	Yamamoto et al. [86]	8	1.9
16	Han et al. [87]	2	0.5	35	Yang & Han [88]	2	0.5
17	Khan et al. [89]	55	13.0	36	Yu et al. [90]	10	2.4
18	Knowles & Park [91]	6	1.4	37	Zhu et al. [92]	6	1.4
19	Lam & Williams [93]	15	3.6		Total	422	100.0