Genomes OnLine Database (GOLD) v.6: data updates and feature enhancements. - Supratim Mukherjee; Dimitri Stamatis; Jon Bertsch; Galina Ovchinnikova; Olena Verezemska; Michelle Isbandi; Alex D. Thomas; Rida Ali; Kaushal Sharma; Nikos Kyrpides; T. B. K. Reddy (Nucleic Acids Res., 2017)