1.   His father was part of a team at Yale Medical School that developed nitrogen mustard as a pioneering treatment for cancer.

2.   In cancer chemotherapy, the first effective drug was nitrogen mustard.

3.   Researchers at Yale University, Memorial Sloan-Kettering Hospital in New York, and other cancer centers ran experiments, using a related gas called nitrogen mustard.

4.   When the team tested nitrogen mustard in a man whose lymphoma cancer had become resistant to radiation, the patient responded as well as the mouse.

5.   Working with toxic chemotherapy preparations, in particular a dangerous drug called nitrogen mustard, accidents occurred.

6.   He was among the first to use a nitrogen mustard as an anticancer drug.