Simplify the following text for a Grade 8 native English-speaking person.
Original: Her ground-breaking work on cancer epidemiology was carried on by Richard Doll and Austin Bradford Hill , who published `` Lung Cancer and Other Causes of Death In Relation to Smoking .
Simplified: Her work on cancer epidemiology was carried on by Richard Doll and Austin Bradford Hill . They published `` Lung Cancer and Other Causes of Death In Relation to Smoking .