Table 4 Bias analysis

Burns et al. [12]

No

No

No

Probably yes

Yes

Yes

Yes

Yes

Ferlito and Recher [26]

No

No

No

Probably yes

Probably yes

Yes

Probably no

Probably yes

Blakeslee et al. [14]

No

No

No

Probably no

Yes

Yes

–

Yes

Lundgren et al. [8]

No

No

No

Probably yes

Yes

Yes

Yes

Yes

Sllamniky et al. [15]

No

No

No

No

Yes

Probably yes

–

Yes

Hagen et al. [16]

Probably yes

No

No

No

Yes

Yes

Probably yes

Probably yes

Fliss et al. [17]

No

No

Yes

No

Yes

Yes

Yes

Yes

Longarela Herrero et al. [18]

No

No

No

No

Probably no

Yes

–

Yes

Maurizi et al. [19]

Probably no

No

No

No

Yes

Yes

No

Probably yes

Damm et al. [20]

Probably yes

No

No

Probably no

Yes

Yes

–

Yes

McCaffrey et al. [21]

No

No

No

No

Yes

Probably no

Probably yes

Probably yes

Strojan et al. [22]

No

No

No

No

Yes

Probably yes

Yes

Probably yes

Hod et al. [23]

Probably no

Probably no

No

No

Yes

Probably yes

No

Yes

Huang et al. [24]

Probably yes

No

No

No

Yes

–

Yes

Yes

Dubal et al. [3]

No

No

No

No

Yes

Probably yes

No

Yes

Jayakrishnan et al. [25]

No

No

No

Probably no

Probably yes

Probably yes

No

Yes