Associations between local COVID-19 policies and anxiety in the USA: a longitudinal digital cohort study by Jeffrey E Olgin, Gregory M Marcus, Rita Hamad, John Kornak, Carmen R Isasi, Ana Sanchez-Birkhead, Mark Pletcher, Soo Park, Natasha Williams, Thomas Carton, Aaron E Cozen, Madelaine Faulkner Modrow, Amy Chiang, Matthew Brandner, Jaime H Orozco, Kristen Azar, Sylvia E K Sudat, Pelin Ozluk, Heather Kitzman, Sara J Knight

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