@misc{indiciaea26ef758544f,
  title = {Longitudinal changes in lung function and respiratory symptoms in progressive systemic sclerosis. Prospective study.},
  author = {G I Greenwald and D P Tashkin and H Gong and M Simmons and S Duann and D E Furst and P Clements},
  year = {1987},
  doi = {10.1016/0002-9343(87)90501-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/3300327/},
  note = {Source identifier: 3300327}
}