Author | Quality assessment criteria | ||||
---|---|---|---|---|---|
Selection | Comparability | Outcome | Overall quality | ||
Gunnlaugsdottir E | 2012 | ** | ** | ** | 6 |
Geir Bertelsen | 2012 | ** | ** | ** | 6 |
Schweitzer K | 2009 | *** | ** | *** | 8 |
Romero-Aroca P | 2007 | ** | ** | *** | 7 |
Hove MN | 2004 | *** | ** | ** | 7 |
Henricsson M | 1996 | ** | ** | ** | 6 |
Deng Y | 2014 | *** | ** | *** | 8 |