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Since we will test the first sample anyway the beginning is easy:
gen Test1=Spec1

Test4 should be as close as possible to (Startdate + 608 days)
and must be > (StartDate + 61 days)
and must be < (EndDate - 91 days)

Test2 should be as close as possible to (StartDate+243 days)
and must be > (StartDate + 61 days)
and must be < (Test4 - 61 days)

Test3 should be as close as possible to the midpoint between Test3 and
Test4
and must be > (Test2 + 61 days)
and must be < (Test4 - 61days)

Thanks in advance for your help,

Elmar

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