BibTex format
@article{Stewart:2021:10.1136/thoraxjnl-2021-217352,
author = {Stewart, I and Bloom, C},
doi = {10.1136/thoraxjnl-2021-217352},
journal = {Thorax},
pages = {1067--1068},
title = {Considerations for conducting and interpreting long-term follow-up of intervention studies: avoiding spoiled milk},
url = {http://dx.doi.org/10.1136/thoraxjnl-2021-217352},
volume = {76},
year = {2021}
}