We must have some heart operations.
Shumacker
Harris B
HB
Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
D004374:Ductus Arteriosus, Patent / Q000266:history* / Q000601:surgery; D049673:History, 20th Century; D006801:Humans; D008297:Male; D010154:Pakistan; D013903:Thoracic Surgery / Q000266:history*