“…We have read with great interest the recently published paper by Dong et al [1] reporting associations of hyperferritinemia with adverse clinical outcomes in COVID-19 patients. Due to different clinical associations present in our cohort of mostly severe and critical COVID-19 patients treated in our institution (University Hospital Dubrava, Zagreb, Croatia) and wider overview of clinical outcomes available from the hospital registry project, we aimed to update the current report with our experience.…”