AUTHOR= Frontiers Editorial Office TITLE=Retraction: Abnormal plasma levels of steroids and their ratios in patients with prurigo nodularis: a pilot study JOURNAL=Frontiers in Physiology VOLUME=14 YEAR=2023 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2023.1293815 DOI=10.3389/fphys.2023.1293815 ISSN=1664-042X