Perhaps you should try some spelling variations:
john edmondson » john edmonds, john edmonston, jonathan edmondson
john edwards » jonathan edwards
john edmund » bohun edmund, hon edmund, von edmund
epidemiologist » epidemiologists, epidemiologie, epidemiologic

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((john edwards) OR (john edmund))) OR (john edmondson)) (epidemiologist).
• Adding a wildcard symbol may retrieve word variants: ((((john edwards) or (john edmund))) or (john edmondson)) (epidemiologist)*.