Published on in Vol 23, No 10 (2021): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22567, first published
.
![Revealing the Nature of Chronic Obstructive Pulmonary Disease Using Self-tracking and Analysis of Contact Patterns: Longitudinal Study Revealing the Nature of Chronic Obstructive Pulmonary Disease Using Self-tracking and Analysis of Contact Patterns: Longitudinal Study](https://asset.jmir.pub/assets/94a6c2cb9549884016d8f69e65838edc.png 480w,https://asset.jmir.pub/assets/94a6c2cb9549884016d8f69e65838edc.png 960w,https://asset.jmir.pub/assets/94a6c2cb9549884016d8f69e65838edc.png 1920w,https://asset.jmir.pub/assets/94a6c2cb9549884016d8f69e65838edc.png 2500w)
1 Epital Health, Gentofte, Denmark
2 Department of Public Health, University of Copenhagen, Copenhagen, Denmark
3 Region Zealand, Sorø, Denmark