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The date, and time as applicable, of an observation timing related to a reference will be collected whenever possible. Only in cases where it is not possible to collect the date of a related observation (e.g., the date is not available), will a relative timing for the observation in relation to a reference be collected. Relative timing will be collected using TIG Collection Variables:

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The figures below show collection of relative timing in relation to a study reference period , and a fixed time point, and . Relative timing in relation to a milestone . Each figure is described collected in the table belowsame way as for a fixed timepoint. Representation of collected reference dates and relative timing in tabulation datasets is indicated below and further described in Section x.x, Assumptions for Observation Classes and Section x.x Add tabulation section link.

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