Portosystemic encephalopathy after transjugular portosystemic shunt in patients with cirrhosis: clinical, laboratory, psychometric, and ectroencephalographic investigations - Nolte,W.; Wiltfang,J.; Schindler,C.; Munke,H.; Unterberg,K.; Zumhasch,U.; Figulla,H.R.; Werner,G.; Hartmann,H.; Ramadori,G. (Hepatology, 1998)