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Severe COVID-19 rate during follow-up, according to baseline plasma FGF23 levels. Cumulative incidence of severe COVID-19 in end-stage renal disease patients in hemodialysis. Severe COVID-19 is defined as the requirements for hospitalizations or COVID-related deaths. Patients were classified according to baseline plasma intact FGF23 levels: low FGF23 (n = 121—blue line) and high FGF23 (n = 122—red line).
