. . . . . . . . . . . . "[In general, osteogenesis imperfecta (brittle bone disease) is caused by heterozygous mutations in the genes encoding the alpha 1 or alpha 2 chains of type I collagen (COL1A1 and COL1A2, respectively).]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2016-02-19"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2016-05-13T12:51:46+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .