safety_specs.xlsx:
Current derivation of ADSL.LDDTHELD is not correct. It is currently described using the treatment start date instead of the treatment end date.
We should read instead and as computed in the {admiral} template and corresponding example here: "Set to duration in days from Date of Last Exposure to Treatment [ADSL.TRTEDT] to Date of Death [ADSL.DTHDT]"
