IL17A and pustular psoriasis: The time from the initiation of IL-17A inhibitors to the onset of pustular psoriasis, 1 case occurred at 1 month (11), 1 case at 2 months (12), 2 cases at 3 months (10), 2 cases at 4 months (12, 13), 2 cases at 9 months (9, 14), and 1 case at 16 months (13).