* From 1971 to 1976: Director of the Center for Human Genetics at Harvard Medical School. * From 1975 to 1979: National Academy of Science Committee on Nuclear and Alternative Energy Systems. * From 1982 to 1988: Chairman Rehabilitation. Committee. * From 1987 to 1990: Referee for the Rongelap Reassessment of the Bikini Atoll Project for the Republic of the Marshall Islands. Dr. Kohn has published more than 150 scientific papers. A few of the topics he has written on are: the biological effectiveness of high energy photons and electrons, the effects of x-ray therapy, nuclear and alternative energy, and the Bikini Atoll rehabilitation.