“…The trial by Chan et al was first published in 2002 [25] and updated in 2005 [26] with the long-term outcome. The same updates were made to the trials by Lee et al [29,30,32,33], Chen et al [34,35], Huang et al [36,37], and Xu et al [42,43]. The preliminary report of the trial by Chua et al was published in 1998 [20], and the long-term outcome of the majority of patients was reported in 2001 [21]; thus we included the latter publication in our study.…”