“…Six studies were further excluded including one study for no available data (Nicklin et al, 2011) and 5 overlapping studies (Tozzi et al, 2005;Zullo et al, 2005;Bijen et al, 2009;. Finally, nine randomized controlled trials with a total of 1263 patients were included into this meta-analysis (Fram, 2002;Tozzi et al, 2005;Zorlu et al, 2005;Chen and Huang, 2007;Wang, 2008;Malzoni et al, 2009;Zullo et al, 2009;Janda et al, 2010;Mourits et al, 2010). The sample size in each trial was relatively small, ranging from 52 to 332 participants.…”