Links
[1] https://www.ctsnet.org/user/login?destination=user/527773
[2] https://www.ctsnet.org/print/home/dugganjohnp
[3] https://www.ctsnet.org/article/posterior-annulus-reinforcement-autologous-pericardium-during-mitral-valve-replacement
[4] https://www.ctsnet.org/articles/duggan.johnp
[5] https://www.ctsnet.org/society/ctsnet