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. 2016 Apr 16;66(Suppl 1):271–278. doi: 10.1007/s13224-016-0885-z
Studies Cases (%) Controls (%) RR (95 % CI)
INTAPP 2010 [7] 1.54 1.25 1.23 (0.62–2.43)
ACTS 2006 [6] 8.7 9.9 0.87 (0.66–1.16)
VIP 2006 [2] 28 24 1.15 (1.02–1.3)
Beazley 2002 [3] 3.8 8.3 0.46 (0.09–2.41)
Sharma 2003 [5] 12 23 0.51 (0.29–0.91)