The front line.
D000769:Anesthesia, Inhalation / Q000266:history; D000985:Antisepsis / Q000266:history; D001315:Australia; D001803:Blood Transfusion / Q000266:history; D005060:Europe; D013502:General Surgery / Q000266:history*; D049669:History, 16th Century; D049672:History, 19th Century; D049673:History, 20th Century; D009493:Neurosurgery / Q000266:history; D011183:Postoperative Complications / Q000266:history; D006113:United Kingdom; D014481:United States