AUTHOR=Amanzio Martina , Palermo Sara TITLE=Editorial: Physical and Cognitive Frailty in the Elderly: An Interdisciplinary Approach JOURNAL=Frontiers in Psychology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2021.698819 DOI=10.3389/fpsyg.2021.698819 ISSN=1664-1078