AUTHOR=Yun Hezhang , Zhang Wenbo , Yu Chen , Li Qiang , Song Yafeng TITLE=Study on the stability and accuracy of the new Booster portable cardiopulmonary function meter JOURNAL=Frontiers in Physiology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1453942 DOI=10.3389/fphys.2024.1453942 ISSN=1664-042X