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Quality of literature included in the meta-analysis (Jadad score)
| Study Identification | Randomization (2 points) |
Double Blinding (2 points) |
Withdraw and Dropout (1 point) | Total Score (5 points) |
|---|---|---|---|---|
| Borst, 2014 [17] | 1 | 0 | 0 | 1 |
| Cherrier, 2001 [20] | 1 | 1 | 1 | 3 |
| Cherrier, 2005 [19] | 1 | 1 | 1 | 3 |
| Cherrier, 2015 [18] | 1 | 2 | 1 | 4 |
| Emmelot-Vonk, 2008 [21] | 2 | 2 | 1 | 5 |
| Huang, 2016 [22] | 1 | 1 | 1 | 3 |
| Janowsky, 1994 [24] | 1 | 1 | 0 | 2 |
| Janowsky, 2000 [23] | 1 | 1 | 1 | 3 |
| Kenny, 2002 [25] | 1 | 0 | 1 | 2 |
| Kenny, 2004 [26] | 1 | 1 | 1 | 3 |
| Lu, 2006 [27] | 1 | 1 | 1 | 3 |
| Resnick, 2017 [28] | 2 | 2 | 1 | 5 |
| Vaughan, 2007 [29] | 2 | 0 | 1 | 3 |
| Wahjoepramono, 2016 [30] | 1 | 1 | 1 | 3 |
| Young, 2010 [31] | 1 | 1 | 0 | 2 |