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Ayoubkhani, Daniel, Kamlesh Khunti, Vahé Nafilyan, Thomas Maddox, Ben Humberstone, Ian Diamond, and Amitava Banerjee. "Post-covid Syndrome in Individuals Admitted to Hospital With Covid-19: Retrospective Cohort Study." BMJ 2021.

Ayoubkhani, Daniel, et al. "Post-covid Syndrome in Individuals Admitted to Hospital With Covid-19: Retrospective Cohort Study." BMJ 2021.