@article {Koskela00086-2021, author = {Heikki O Koskela and Anne M L{\"a}tti}, title = {Sputum production in chronic cough increases the probability of asthma. A cross-sectional questionnaire study}, elocation-id = {00086-2021}, year = {2021}, doi = {10.1183/23120541.00086-2021}, publisher = {European Respiratory Society}, URL = {https://openres.ersjournals.com/content/early/2021/03/18/23120541.00086-2021}, eprint = {https://openres.ersjournals.com/content/early/2021/03/18/23120541.00086-2021.full.pdf}, journal = {ERJ Open Research} }