AUTHOR=Rockland Kathleen S. TITLE=Clustered Intrinsic Connections: Not a Single System JOURNAL=Frontiers in Systems Neuroscience VOLUME=16 YEAR=2022 URL=https://www.frontiersin.org/journals/systems-neuroscience/articles/10.3389/fnsys.2022.910845 DOI=10.3389/fnsys.2022.910845 ISSN=1662-5137