Eisai Co. Ltd. has exercised its right to opt-in on Biogen Inc.'s Phase III Alzheimer's disease candidate aducanumab with terms that appear favorable to Biogen. The companies announced the expansion of their existing development and commercialization deal Oct. 23.
Biogen will continue to oversee the development of the anti-amyloid beta antibody and receive 55% of profits in the US...





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