Promoter methylation patterns of <i>ABCB1</i>, <i>ABCC1</i> and <i>ABCG2</i> in human cancer cell lines, multidrug-resistant cell models and tumor, tumor-adjacent and tumor-distant tissues from breast cancer patientsMelanie Spitzwieser, Margit Cichna‐Markl|Oncotarget|2016Cited by 40