Correction: Genomic characterization of Escherichia coli with a polyketide synthase (pks) island isolated from ulcerative colitis patients - Chao Lv; Mohd Abdullah; Chun-Li Su; Weiye Chen; Nan Zhou; Zile Cheng; Yiwen Chen; Min Li; Kenneth W. Simpson; Ahmed Elsaadi; Yongzhang Zhu; Steven M. Lipkin; et al. (BMC Genomics)