Regional brain function in hallucinations: a study of regional cerebral blood flow with 99m-Tc-HMPAO-SPECT in patients with auditory hallucinations, tactile hallucinations, and normal controls. - Musalek,M.; Podreka,I.; Walter,H.; Suess,E.; Passweg,V.; Nutzinger,D.; Strobl,R.; Lesch,O.M. (Compr Psychiatry, 1989)