NCBI provides as part of Entrez the online version of the OMIM catalog of human genes and genetic disorders authored and edited by the late Victor A. McKusick and his staff at The Johns Hopkins University (21). The database contains information on disease phenotypes and genes, including extensive descriptions, gene names, inheritance patterns, map locations, gene polymorphisms and detailed bibliographies. Entrez OMIM contains over 20 500 entries, including data on over 12 900 established gene loci and phenotypic descriptions.
