I found the reference. I assume you're referring to the primary end-point of their initial study which was "effect on self-reported CFS symptoms three months after intervention"? As has been widely discussed, the effects showed up 6-10+ months after initial intervention (which was a very intriguing finding), and were often not sustained. They've since modified their protocol to include maintenance doses, so the results of their phase three trial will be very interesting, when it's finally complete.