https://cancerimagingjournal.biomedcentral.com/articles/10.1186/s40644-021-00411-9 https://cancerimagingjournal.biomedcentral.com/articles/10.1186/s40644-021-00412-8 https://cancerimagingjournal.biomedcentral.com/articles/10.1186/s40644-021-00410-w https://cancerimagingjournal.biomedcentral.com/articles/10.1186/s40644-021-00413-7 https://cancerimagingjournal.biomedcentral.com/articles/10.1186/s40644-021-00416-4