IMG/VR: a database of cultured and uncultured DNA Viruses and retroviruses. - David Páez-Espino; I-Min A. Chen; Krishna Palaniappan; Anna Ratner; Ken Chu; Ernest Szeto; Manoj Pillay; Jinghua Huang; Victor M. Markowitz; Torben Nielsen; Marcel Huntemann; T. B. K. Reddy; et al. (Nucleic Acids Res., 2017)