title: Editorial comments.
authors: amoskor@post.tau.ac.il
authors: Amos D
authors: AD
authors: Korczyn
mesh_terms: D006801:Humans; D010300:Parkinson Disease / Q000000981:diagnostic imaging*; D013378:Substantia Nigra / Q000000981:diagnostic imaging*; D017585:Ultrasonography, Doppler, Transcranial / Q000592:standards*