| Author |
Year |
Randomization |
Allocation concealment |
Blinding of outcome assessors |
Loss of follow-up (%) |
| Ang |
2008 |
unclear |
unclear |
Yes |
1.6 |
| Hendrikx |
2006 |
adequate |
unclear |
Yes |
15 |
| Hu |
2011 |
adequate |
adequate |
Yes |
0 |
| Patel |
2005 |
adequate |
adequate |
Yes |
5 |
| Stamm |
2007 |
adequate |
unclear |
Yes |
0 |
| Yerebakan |
2011 |
adequate |
adequate |
Yes |
0 |
| Zhao |
2008 |
adequate |
unclear |
Yes |
5.6 |
|
