First author (year) | Restriction of publication language | Restriction of publication status | Search database | |||||
---|---|---|---|---|---|---|---|---|
PubMed | MEDLINE | Embase | Cochrane Library | CINAHL | Others | |||
Khan RJ (2005) | No | No | + | + | + | + | + | |
Khan RJ (2010) | No | No | + | + | + | + | + | |
McMahon SE (2011) | No | No | + | + | + | + | + | |
Jones MP (2012) | No | No | + | + | + | + | + |