“…The electronic literature searches of the Medline and CNKI databases for studies on the association of the IL13 C‐1112T and/or G+2044A polymorphisms with asthma identified 44 publications (23 on C‐1112T, 38 on G+2044A and 17 on both). After review of the full‐text articles, 26 publications were excluded from the meta‐analysis for the following reasons: six did not report detailed genotype frequencies, 18,22,36–39 six were multiple publications on the same study populations, 26,40–44 four had family‐based study designs, 20,45–47 four did not report case–control studies, 19,21,48,49 and six were low quality publications (quality score ≤4) 50–55 . Because the publications of Donfack et al 56 .…”