How do clinicians use post-COVID syndrome diagnosis? Analysis of clinical features in a Swedish COVID-19 cohort with 18 months’ follow-up: a national observational cohort and match... oleh Naja Hulvej Rod, Andrea Ganna, Lill Trogstad, Marie Eriksson, Osvaldo Fonseca-Rodríguez, Anne-Marie Fors Connolly, Per Minor Magnus, Hanna M Ollila, Ida Henriette Caspersen, Sebastian Kalucza, Johan Normark