[This corrects the article DOI: 10.3389/fonc.2018.00652.].
Keywords: cfDNA; drug resistance; liquid biopsy; molecular target; precision oncology; tumor burden; tumor heterogeneity.
Copyright 2021 Ghatalia, Smith, Winer, Gou, Kiedrowski, Slifker, Saltzberg, Bubes, Anari, Kasireddy, Varshavsky, Liu, Ross and El-Deiry.