Erratum

Cerebral Ammonia Metabolism in Patients with Severe Liver Disease and Minimal Hepatic Encephalopathy Alan H. Lockwood, Eddy W. H. Yap, and Wai-Hoi Wong [Originally published in Journal of Cerebral Blood Flow and Metabolism 1991;11;337–341] [Originally published in Journal of Cerebral Blood Flow and Metabolism 1991;11;337–341] The first sentence of the third paragraph of the Discussion, on page 339, should read as follows: “In aqueous solutions at physiological pH values, about 1–2% of all ammonia exists as a diffusible gas, with the remainder present as the less mobile charged ammoniumion.”