1 Division of Internal Medicine, Clinica Medica "A. Murri", Department of Biomedical Sciences and Human Oncology, University of Medicine "Aldo Moro", Bari, Italy. Electronic address: pierluigi.carratu@uniba.it.
2 Division of Internal Medicine, Department of Biomedical Sciences and Human Oncology, Medical School of Bari, University of Medicine "Aldo Moro", Bari, Italy.
3 Division of Internal Medicine, Clinica Medica "A. Murri", Department of Biomedical Sciences and Human Oncology, University of Medicine "Aldo Moro", Bari, Italy.