K Michael Cummings1, Riccardo Polosa2,3. 1. Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, USA. 2. Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy. polosa@unict.it. 3. Institute of Internal and Emergency Medicine, Teaching Hospital "Policlinico - V. Emanuele," University of Catania, Catania, Italy. polosa@unict.it.
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