Table 2 Primary studies included in meta-analyses
First author (Year) | Schroeder D (1997) | Majewski M (2000) | Lim J (2001) | Gigante A (2008) | Aktas S (2009) | Valencia AJA (2009) |
|---|---|---|---|---|---|---|
Khan RJ (2005) | + | + | ||||
Khan RJ (2010) | + | + | + | + | ||
McMahon SE (2011) | + | + | + | + | + | + |
Jones MP (2012) | + | + | + | + |