The Annals of Thoracic SurgeryVolume 49, Issue 6, June 1990, Page 978AnnouncementNotice from the American Board of Thoracic SurgeryAuthor links open overlay panelShow moreShareCitehttps://doi.org/10.1016/0003-4975(90)90880-FPrevious article in issueNext article in issueRecommended articlesCited by (0)View AbstractCopyright © 1990 Published by Elsevier Inc. All rights reserved.