English to French Medical Medical: Pharmaceuticals essais cliniques

I got this long explanation but I still don't know what is the accepted translation for this in the field:

Merci d'avance!

Common phase III clinical study designs consider issues of timing and switching. The “testing of timing” study design depicts a situation in which the optimal time to initiate therapy is unknown. The study team has selected 2 points in the clinical course of the disease to investigate. Patient entry and randomization is set at the earlier of these points and patients are randomized to the standard therapy or a “delay” arm. The subsequent trigger point (most often a clinical or laboratory event) on the delay arm would determine the initiation of the standard therapy for that group of patients. A comparison of results for these 2 groups would clarify the advantages of a delay in therapy initiation, if any.

Similarly, the “testing of switching” study design gives a strategy for evaluation of a switch from the standard therapy to a new experimental therapy. All patients would be treated on standard therapy up to a specific point, often a chronological time or a clinical or laboratory event, at which point the patients would enter the study and be randomly assigned to continue the current standard therapy or switch to the new experimental therapy. The value of the switch could then be evaluated by a direct comparison of the 2 randomized groups.