| No. | Reference No. | Reason for Exclusion |
| 1 | Reed 2008 [49] | Review article |
| 2 | Reed 2002 [50] | Did not report outcome of interest |
| 3 | Dehlin 2013 [51] | Did not report outcome of interest |
| 4 | Esposito 2013 [52] | Did not report outcome of interest |
| 5 | Gainsbury, 2011 [53] | Did not report outcome of interest |
| 6 | Azma 2014 [54] | Irrelevant intervention |
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