Progressive systemic sclerosis presenting with spontaneous pneumothorax.

@article{Lang1989ProgressiveSS,
  title={Progressive systemic sclerosis presenting with spontaneous pneumothorax.},
  author={B. Lang and H Ortlieb and S. Meske and G. Hauke and Hans Hartmut Peter},
  journal={The Journal of rheumatology},
  year={1989},
  volume={16 2},
  pages={254-6}
}