  == CHI3L1 ==  According to the the New England Journal of Medicine, an allele of the gene CHI3L1 doubles the risk of getting Asthma. However, the section on genetics seems to have a requirement that the effect must be found in six populations or something, I can't figure it out, perhaps somebody misunderstood a QTL study. CHI3L1 has been mentioned in the major news media, so it needs to be added to the article.   