Russian to English Medical Medical: Pharmaceuticals Clinical trial terminology

These are two separate items listed next to each other, both requiring separate new consent forms.

One guess is that one of them is "rechallenge" and the other is "reinitiation", but which is which? Or is it "continuation" for повторное and "rechallenge" for возобновление? Available study docs indicate no dose ranging, no crossover, no blind, so it doesn't seem to be a matter of reassigning or adjusting the treatment.

PS Source Russian is clearly based on study documents translated from English (possibly badly)