TY - RPRT TI - Longitudinal changes in lung function and respiratory symptoms in progressive systemic sclerosis. Prospective study. AU - G I Greenwald AU - D P Tashkin AU - H Gong AU - M Simmons AU - S Duann AU - D E Furst AU - P Clements PY - 1987 DO - 10.1016/0002-9343(87)90501-8 UR - https://pubmed.ncbi.nlm.nih.gov/3300327/ ID - 3300327 ER -