1. Laboratory of Clinical Biochemistry, Mass Spectrometry Section, Sant’Andrea University Hospital, Rome, Italy
2. Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
3. Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
4. Department of Neurology and Psychiatry, Sapienza University, Rome, Italy
5. Bipolar & Psychotic Disorders Program, McLean Hospital, Belmont, MA, USA
6. Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
7. I.R.C.C.S. Neuromed, Pozzilli, Italy
8. Department of Neurosciences, Mental Health and Sensory Organs (NESMOS), Sapienza University, Advanced Molecular Diagnostic Unit (Dima), Sant’Andrea Hospital-Sapienza University, Rome, Italy