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. 2014 Mar 13;15:45. doi: 10.1186/1471-2296-15-45

Table 2.

Bias assessment of included trials[9]

Reference Adequate sequence generation Allocation concealment Blinding of participants and personnel Blinding of outcome assessment Incomplete outcome data adressed Free of selective reporting Free of other bias
de Mey et al. [15]
Yes
Unclear
Yes
Unclear
Yes
Unclear
No
Schutz et al. [14]
Yes
Unclear
Yes
Unclear
Yes
Unclear
No
Fischer et al. [16]
Yes
Unclear
Yes
Unclear
Yes
Unclear
No
Fischer et al. [16]
Yes
Unclear
Yes
Unclear
Yes
Unclear
No
de Mey et al. [15] Yes Unclear Yes Unclear Yes No No