Ocera Therapeutics Inc. CEO Linda Grais told BioWorld Today that a closer look at data from the failed-but-validating phase IIb STOP-HE study with intravenous (I.V.) OCR-002 (ornithine phenylacetate) gives the company "the basis for an argument that [ammonia levels] should at least be part of a potentially composite endpoint, but we do expect we would still need a clinical component as well" in the next experiments with the compound, in the works for hospitalized patients with hepatic encephalopathy (HE).