Links
[1] https://www.utmb.edu/surgery/cardio/Roughneen.asp
[2] https://www.ctsnet.org/user/login?destination=user/497456
[3] https://www.ctsnet.org/print/home/ptroughn
[4] https://www.ctsnet.org/article/repair-rare-direct-gerbode-defect-secondary-aortic-and-tricuspid-valve-endocarditis
[5] https://www.ctsnet.org/articles/ptroughn
[6] https://www.ctsnet.org/society/ctsnet