Probably to make the results even stronger? This is often done by scientists: Even when we did THIS, our results are still statistically significant. In a publication, they might present the results both including and excluding these participants.
You're very welcome Senti. I am trying to think why those lost to follow could have been taken out of the study. Could it be something a regulatory agency or somebody else (peer reviewer, consultant, etc.) asked them to do for being part of the earliest time of the trial and as such, having problems with other recruitment and initial information also?
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