@article {i1, editor = {,}, title = {Preface and introduction}, volume = {59}, number = {suppl 1}, pages = {i1--i6}, year = {2004}, publisher = {BMJ Publishing Group Ltd}, issn = {0040-6376}, URL = {https://thorax.bmj.com/content/59/suppl_1/i1}, eprint = {https://thorax.bmj.com/content/59/suppl_1/i1.full.pdf}, journal = {Thorax} }