Links
[1] https://www.ctsnet.org/user/login?destination=user/535280
[2] https://www.ctsnet.org/print/home/birgit-feil
[3] https://www.ctsnet.org/article/video-assisted-thoracoscopic-first-rib-resection-craniotome-novel-approach-venous-thoracic
[4] https://www.ctsnet.org/articles/Birgit%20Feil
[5] https://www.ctsnet.org/society/ctsnet