“…Compared to that review, this one has included 20 additional studies 6,7,8,9,10,11,12,13,14,24,43,79,83,95,99,102,103,122,125,188 that have added about 10,000 cases of defects, and 800,000 of controls. Another difference between the two reviews is that 19 studies about abdominal wall defects were included in the meta-analysis of the gastro-intestinal system in the previous review, whereas these defects were classified as pertaining to the musculoskeletal system in this review.…”