I cannot say this with complete assurance of fact, but I believe that the regulatory restrictions of the Direct trial, being "first in man" necessitated only one site being injected. Trying two sites isn't necessarily indicative of systemic failure. Optimizing the positive immune response is likely a delicate balance, as Linda mentioned in her talk, that the immune system can be very toxic. They are just likely figuring out an optimal dosing strategy and starting slowly to satisfy regulators.