Piper Jaffray analyst Joshua Schimmer says shares of GW Pharmaceuticals sold off yesterday in response to an abstract posted for the American Epilepsy Society conference in December describing a single center's experience with Epidiolex for seizures. The results support the drug's potent activity in Dravet syndrome, but some investors have concern with the drop-out rate due to inactivity and the lower response rate compared to what has otherwise been described for Epidiolex, Schimmer told investors last night in a research note titled "Over-Reacting To A Tree When The Forest Remains In Good Shape." The dropout rate is likely a result of the center's "highly questionable" practice of stopping drug if seizure reduction doesn't reach 50%, while the lower response rate at one site shouldn't detract from a "much bigger, robust clinical experience spanning multiple centers," Schimmer argues. He reiterates an Overweight rating on GW with a $147 price target. The stock closed yesterday down $5.42 to $82.30.