Herman V. Allington, A. Fletcher Hall, and the introduction of liquid nitrogen.
Steffen
Charles
C
D003451:Cryoprotective Agents / Q000266:history*; D017679:Cryotherapy / Q000266:history; D003880:Dermatology / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D009584:Nitrogen / Q000494:pharmacology; D014481:United States
D003451:Cryoprotective Agents; D009584:Nitrogen