| Study | Reason for exclusion |
|---|---|
| ACTRN12611000500954 | Wrong intervention |
| Ambrus 2003 | Wrong intervention |
| Ashurst 2003 | Wrong intervention |
| Cheng 2008 | Wrong intervention |
| Chertow 2003 | Wrong intervention |
| Clark 2010 | Wrong intervention |
| Moe 2011 | Study duration was shorter than our inclusion criteria |
| Morey 2008 | Wrong intervention |
| NCT01665651 | Wrong intervention |
| Olivero 2006 | Wrong intervention |
| Padhi 2007 | Wrong intervention |
| Spiegel 2012 | Study duration was shorter than our inclusion criteria |
| Young 2009a | Wrong intervention |
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