Question: If an additional trial is done for full

Question: If an additional trial is done for full approval, is it called a phase 4 trial? And is it randomized, blinded, and with a placebo? Or is it more like our open label usage now where all patients get LL but with better data gathering from patients? Seems to me it would be pretty cruel to be still giving patients placebo if you have an EUA. Ganesha