—multi-factorial etiology of hepatocellular cancer, with emphasis on the interactive effects of hepatitis B and C viruses, tobacco smoking, and ethanol intake —Several oncology firsts: .

He also was first in 1981, along with an independent paper published a few days later, to report that secondhand smoke increases the risk of lung cancer.

Though seemingly self-evident, researchers were able to determine statistically that these cancer patients were significantly more likely to have been exposed to their husband's cigarettes.

in Boston at the Harvard School of Public Health and held several teaching appointments there over the next two decades (lecturer, 1969–1970; visiting professor, 1981–1985; adjunct, 1988–1989).

He further studied Pathology, Microbiology, Public Health, and Epidemiology at universities of Athens, London, Oxford, and Harvard.

[11] - Outlines career and life of Prof. Dimitrios Trichopoulos, as interviewed by current HSPH colleague and Chair of Epidemiology