An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Gemma M, Beretta L, De Vitis A, Mattioli C, Calvi MR, Antonino A, Rizzi B, Crippa L, D'Angelo A.Gemma M, et al. Among authors: calvi mr.Acta Neurochir Suppl. 1998;71:320-3. doi: 10.1007/978-3-7091-6475-4_93.Acta Neurochir Suppl. 1998.PMID: 9779219
Gemma M, de Vitis A, Baldoli C, Calvi MR, Blasi V, Scola E, Nobile L, Iadanza A, Scotti G, Beretta L.Gemma M, et al. Among authors: calvi mr.J Neurosurg Anesthesiol. 2009 Jul;21(3):253-8. doi: 10.1097/ANA.0b013e3181a7181d.J Neurosurg Anesthesiol. 2009.PMID: 19543005Clinical Trial.