https://pubmed.ncbi.nlm.nih.gov/1695185/
[Increased leukopoietic effect of 2-cyanoethylurea by doubling the oxygen concentration of the air]
In Wistar rats the sure leukopoietic effect of 165 mg/kg-1 of 2-cyanethylurea was found to be increased distinctly and in some cases significantly by doubling...