... N Engl J Med 1993; 328:1732-1739June 17, 1993DOI: 10.1056/NEJM199306173282402. ... Proc Natl Acad Sci USA 1988;85:9797-9800 CrossRef | Web of Science | Medline. 16. Stewart DJ , Levy RD , Cernacek P , Langleben D . Increased plasma endothelin-1 in pulmonary ...