Erratum regarding missing patient consent statements in previously published articles

[This corrects the article DOI: 10.1016/j.radcr.2021.01.007.][This corrects the article DOI: 10.1016/j.radcr.2021.05.035.][This corrects the article DOI: 10.1016/j.radcr.2021.01.033.][This corrects the article DOI: 10.1016/j.radcr.2021.04.040.].