There source the lancet (same organization that gave us masks when they admitted without scientific standing)
https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(21)00084-5/fulltext
Found here:
6-month neurological and psychiatric outcomes in 236 379 survivors of COVID-19: a retrospective cohort study using electronic health records 2021 Apr 6
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8023694/