1.   Just transferred to the medical physics department.

2.   And yet again, he switched careers, going to work in medical physics and studying the hazards of nuclear radiation.

3.   Barschall worked instead in medical physics and nuclear engineering for the rest of his career, turning to the use of fast neutrons in the treatment of malignancies.

4.   Rotblat switched to medical physics, devoting years to a study of the effects of ionizing radiation on human beings.

5.   First, he switched from nuclear physics to medical physics where he could control how his work would be used.

6.   He switched from nuclear physics to medical physics, where he could control how his work would be used.