AUTHOR=Ando Masato , Kubota Kazuo , Kadowaki Saori , Kawamoto Minako , Kawamoto Norio , Okamoto Haruka , Nagaya Soichiro , Miwa Yuki , Ohnishi Hidenori TITLE=Atypical hemolytic uremic syndrome with a C3 variant following COVID-19: a case report JOURNAL=Frontiers in Pediatrics VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/pediatrics/articles/10.3389/fped.2025.1507727 DOI=10.3389/fped.2025.1507727 ISSN=2296-2360