- Correspondence to Professor Giuseppe Esposito, Department of Physiology and Pharmacology ‘Vittorio Erspamer’, La Sapienza University of Rome; ; Dr Giovanni Sarnelli, Department of Clinical Medicine and Surgery, ‘Federico II’ University of Naples, Naples, Italy;
- Received April 2, 2013
- Revised August 16, 2013
- Accepted August 19, 2013
- First published September 30, 2013.
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