Table 4.

Quality assessment of the included studies. Cross-over studies where A = Randomized treatment order; B = Carry-over effect; C = Performance bias; D = Detection bias; E = Attrition bias; F = Reporting bias; G = Other bias. * Parallel studies where A = Random sequence generation and B = Allocation concealment.

Study	A	B	C	D	E	F	G
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33] *
[36]
[37]
[39]
[34]
[35]
[38]
[40]
[41]
[42] *
[43]
[44]
[45]