AUTHOR=Dogru Damla , Dogru Yagmur , Atschekzei Faranaz , Elsayed Abdulwahab , Dubrowinskaja Natalia , Ernst Diana , Witte Torsten , Gödecke Vega , Sogkas Georgios TITLE=Reappraisal of IgG subclass deficiencies: a retrospective comparative cohort study JOURNAL=Frontiers in Immunology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1552513 DOI=10.3389/fimmu.2025.1552513 ISSN=1664-3224