RT Journal Article SR Electronic T1 The puzzles surrounding the impact of face masks on 6-minute walking distance in pulmonary hypertension JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2301879 DO 10.1183/13993003.01879-2023 VO 63 IS 5 A1 Ma, Jie-Ling A1 Wang, An-Yi A1 Lu, Dan A1 Cheng, Chun-Yan A1 Jing, Zhi-Cheng YR 2024 UL https://publications.ersnet.org//content/63/5/2301879.abstract AB