@misc{indiciae3539843df043, title = {Effect of cold air on exercise capacity in COPD: increase or decrease?}, author = {H Koskela and J Pihlajamäki and H Pekkarinen and H Tukiainen}, year = {1998}, doi = {10.1378/chest.113.6.1560}, url = {https://pubmed.ncbi.nlm.nih.gov/9631794/}, note = {Source identifier: 9631794} }