Mayo Clinic was first.
Nichols
Douglas A
DA
D000046:Academic Medical Centers / Q000266:history*; D004621:Embolization, Therapeutic / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D002532:Intracranial Aneurysm / Q000266:history*; D008910:Minnesota; D015642:Radiology, Interventional / Q000266:history*