1 Division of Internal Medicine and Laboratory of Chronobiology, Department of Medical Sciences, Fondazione IRCCS "Casa Sollievo Della Sofferenza", San Giovanni Rotondo, Foggia, Italy.
2 Department of Internal Medicine, Division of Digestive Disease and Nutrition, Rush University Medical Center, Chicago, IL, USA.
3 International Clinical Research Center, St'Anne University Hospital, Brno, Czech Republic; Institute for Liver and Digestive Health, Division of Medicine, University College London, London, United Kingdom. Electronic address: manlio.vinciguerra@fnusa.cz.