Cluster 602: interpretation affect results malignancy compliance protocol second judgment history primary Cluster 651: malignancy concurrent active treatment presence patients patient actively skin years Cluster 1106: malignancy concurrent requiring active intervention therapy treatment participants immediate requires Cluster 1847: remission malignancy primary years history invasive second complete patients year Cluster 2302: malignancies active concurrent expectant observation killer patients natural requiring history Cluster 2361: second malignancy active currently requiring years primary cancer concurrent treatment Cluster 2469: cancers primary active skin requiring patients systemic treatment second cured