Table 3: Results about risk of bias in the included studies.

Study Sequence Generation Allocation Concealment Blinding Incomplete Outcomes Data Selective Reporting Bias Other Sources of Bias
Majid (2011) YES YES NO NO NO YES
Majid and Mahmood (2011) YES YES NO NO NO YES
Majid and Mahmood (2013) YES YES NO NO NO YES
Barghava (2014) UNCLEAR UNCLEAR YES NO NO NO

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