Table 2 Quality evaluation of the included studies

Mehrabi et al. [8]

**

**

**

******

Portugal-Nunes et al. [24]

**

*

**

*****

Park and Lee et al. [29]

***

**

**

*******

Kim et al. [1]

**

**

**

******

Seo et al. [25]

***

***

**

********

Imbiriba et al. [26]

**

**

*

*****

Delgado et al. [23]

**

*

*

****

Amiri et al. [32]

**

**

*

*****

Yosaee et al. [27]

*

**

*

****

Truthmann et al. [22]

**

**

*

*****

Hinnouho et al. [30]

**

***

***

********

Lopez-Garcia et al. [5]

**

***

**

*******

Donini et al. [4]

*

**

**

*****

Yang et al. [12]

*

**

**

*****

Phillips et al. [7]

****

**

**

********

Hamer et al. [28]

**

**

**

******

Ul-Haq et al. [31]

**

**

**

******

Tsai et al. [6]

*

*

**

****