AUTHOR=Garbarino Sergio , Lanteri Paola , Sannita Walter G. , Bragazzi Nicola L. , Scoditti Egeria TITLE=Circadian Rhythms, Sleep, Immunity, and Fragility in the Elderly: The Model of the Susceptibility to Infections JOURNAL=Frontiers in Neurology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2020.558417 DOI=10.3389/fneur.2020.558417 ISSN=1664-2295