| Studies |
Selection |
Ascertainment |
Causality |
Reporting |
| Banuchi 2014 |
√ |
√ √ |
X |
√ |
| Baugh 2013 |
√ |
√ X |
√ |
√ |
| Hathaway 2006 |
√ |
√ √ |
X |
√ |
| Kandasamy 2013 |
√ |
√ √ |
X |
√ |
| Kieff 2004 |
X |
√ √ |
X |
√ |
| Pang 2012 |
√ |
√ √ |
X |
√ |
| Rotenberg 2015 |
√ |
√ √ |
X |
√ |
| Spiegel 2005 |
√ |
√ √ |
X |
√ |
| Strocker 2008 |
√ |
√ √ |
√ |
√ |
| Terris 1998 |
√ |
√ √ |
X |
√ |