1 Department of Internal Medicine and Medical Therapeutics, University of Pavia, Pavia, Italy; First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, Pavia 27100, Italy.
2 First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, Pavia 27100, Italy.
3 Biostatistics & Clinical Trial Center, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
4 Department of Internal Medicine and Medical Therapeutics, University of Pavia, Pavia, Italy; First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, Pavia 27100, Italy. Electronic address: gr.corazza@smatteo.pv.it.