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Proceedings of the National Academy of Sciences of the United States of America|March 1, 1973
Contraction of isolated smooth-muscle cells--structural changesF S Fay, C M Delise
The Journal of Reproductive Medicine|January 1, 1982
Surfactants, L/S ratio, amniotic fluid optical density and fetal pulmonary maturityA J Sbarra, C L Cetrulo, R J Selvaraj, et al.
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