[1] EPGD: a comprehensive web resource for integrating and displaying eukaryotic paralog/paralogon information

[2] Database resources of the National Center for Biotechnology Information

[3] The Universal Protein Resource (UniProt)

[4] The Ensembl genome database project

[5] The Bioperl toolkit: Perl modules for the life sciences

[6] outcome determinants of health systems integration: case studies in usa, germany and poland