Letter: Use of vinyl ether.
D000766:Anesthesia, Dental; D000768:Anesthesia, General; D004987:Ethers / Q000592:standards; D006221:Halothane / Q000592:standards; D009609:Nitrous Oxide / Q000592:standards; D010100:Oxygen
D004987:Ethers; D009609:Nitrous Oxide; D010100:Oxygen; D006221:Halothane