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In page David Geffen:
"Geffen remained in charge until December 1975, when he went to work as vice chairman of Warner Bros. film studios.[2] He then retired and in 1977 was informed (erroneously) that he had cancer.[3] During his retirement period he spent a short time (the fall of 1978 and spring of 1979) teaching a noncredit seminar on the music industry and arts management at Yale University, where he featured classroom guests Jackson Browne and Paul Simon.[4] In 1980 a new medical diagnosis revealed the error in the original diagnosis[5] and Geffen was given a clean bill of health, whereupon he decided to return to working in the entertainment industry.
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