A Szegedi, R Kohnen, A Dienel, M Kieser
Szegedi A, Kohnen R, Dienel A, Kieser M.
Acute treatment of moderate to severe depression with hypericum extract WS 5570 (St John's wort): randomised controlled double blind non-inferiority trial versus paroxetine
BMJ 2005; 330 :503
doi:10.1136/bmj.38356.655266.82