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Protocol
Community determinants of COPD exacerbations in elderly patients in Poland: protocol for a retrospective Big Data observational cohort study
- Correspondence to Dr Maciek Godycki-Cwirko; maciekgc{at}uni.lodz.pl
Citation
Community determinants of COPD exacerbations in elderly patients in Poland: protocol for a retrospective Big Data observational cohort study
Publication history
- Received March 19, 2019
- Revised June 6, 2019
- Accepted June 7, 2019
- First published June 22, 2019.
Online issue publication
August 05, 2023
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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.