Data collection
For all 6,165 five-year childhood cancer survivors in the underlying LATER cohort, detailed information on childhood cancer diagnosis and treatment for the primary cancer and all recurrences was collected from the historic medical records, prior to this study. (Teepen et al. submitted) The overall concept of data collection for the LATER 2 study is summarized in Supplemental information Table 2 and Table 3, and alluded to below.