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Table 2 Literature quality evaluation

From: The relationship between aspirin consumption and hepatocellular carcinoma: a systematic review and meta-analysis

Inclusion in the literature

Crowd selection

Comparability between group

Measurement results

NOS score

Yun B [16]

4

2

3

9

Singh J [17]

4

1

3

8

Won- Mook Choi [18]

4

2

2

8

Vicki Wing-Ki Hui [19]

4

2

3

9

Simon, T.G. [20]

4

2

3

9

Shin, S [21]

4

1

3

8

Liao YH [22]

4

2

3

9

Lee, T.Y. [23]

4

2

3

9

Sung JJ [24]

4

2

3

9

Lee, T.Y. [25]

4

2

3

9

Simon, T.G. [6]

4

2

3

9

Hwang, I.C. [26]

4

2

3

9

Ho CM-HBV [27]

4

2

3

9

Ho CM-HCV [27]

4

2

3

9

Tseng CH [28]

4

2

3

9

Lin YS [29]

3

2

2

7

Lee, M [30]

4

1

3

8

Lee, T.Y. [31]

4

2

3

9

Petrick, J.L. [32]

4

2

3

9