- Correspondence to Professor Antonio Di Sabatino, Clinica Medica I, Fondazione IRCCS Policlinico San Matteo, Università di Pavia, Piazzale Golgi 19, Pavia 27100, Italy;
- Received November 21, 2014
- Revised June 18, 2015
- Accepted June 23, 2015
- First published September 4, 2015.
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- Data supplement 1 - Online supplement
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