Dimpfel, W Pharmacodynamic properties of St. John's wort-A single blind neurophysiological study in healthy subjects comparing two commercial preparations. [electronic resource] - European journal of medical research Aug 1999 - 303-12 p. digital Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article ISSN: 0949-2321 Subjects--Topical Terms: AdultCircadian RhythmElectric StimulationElectroencephalography--drug effectsEvent-Related Potentials, P300FemaleHumansHypericum--chemistryMalePlant Extracts--isolation & purificationPlants, MedicinalSingle-Blind Method