Funding for this research was provided by:
Finnish Respiratory Disease Research Foundation
Finnish Allergy Research Foundation
Finnish Athletics Research Foundation
Ida Montin Foundation
Ministry of Health and Social Affairs of Finland
Ministry of Education and Culture
Received: 20 November 2020
Accepted: 22 September 2021
First Online: 4 October 2021
: Ethics approval from the ethical committee of Helsinki and Uusimaa hospital district and consent to participate were included in this study. All measurements were carried out in accordance with relevant guidelines and regulations of American Thoracic Society (ATS) and European Respiratory Society (ERS). Informed consent was obtained from all study subjects participating pulmonary function testing. Informed consent was obtained from a parent or a legal guardian for participants under 18 years.
: Not applicable.
: There are no competing interests by any of the authors of this study.