1. Plasma sphingomyelin and longitudinal change in percent emphysema on CT. The MESA Lung study Ahmed, Firas S.; Jiang, Xian-cheng; Schwartz, Joseph E.; Hoffman, Eric A.; Yeboah, Joseph; Shea, Steven J. C.; Burkart, Kristin Marie; Barr, R. Graham 2014 Articles TomographyCeramidesEmphysema, PulmonaryMedical sciencesMedicineDiagnostic imaging