1. 1st Neurology Clinic, Eginition Hospital; Athens University Medical School; Athens Greece
2. 2nd Neurology Clinic, Attikon Hospital; Athens University Medical School; Athens Greece
3. Nuclear Medicine Unit; Attikon Hospital; Athens Greece
4. Neurology Clinic; Henry Dunan Hospital; Athens Greece
5. Institute for Neurodegenerative Disorders; New Haven Connecticut USA
6. Neurology Clinic; Philipps University; Marburg Germany
7. Parkinson's Disease and Movement Disorders Department, HYGEIA Hospital; Athens Greece