https://www.fiercepharma.com/pharma/abbvie-quickly-wraps-its-101b-buyout-immunogen-another-good-sign-biopharma-ma
https://www.fiercepharma.com/pharma/inside-abbvies-10b-immunogen-buyout-and-bidding-war-it-won
https://www.reuters.com/markets/deals/abbvie-buy-immunogen-101-billion-boost-cancer-drug-portfolio-2023-11-30/