Updated Story: Since this story was first posted, all companies agreed to testify. Executives from the seven companies invited to testify about drug prices before the Senate Finance Committee have agreed to show up: AbbVie, Bristol-Meyers Squibb, Sanofi, Merck & Co, Pfizer, Johnson & Johnson’s Janssen, and AstraZeneca. After having a difficult time getting drug company executives to testify at a Jan. 29 hearing, Finance Chair Chuck Grassley (R-IA) and ranking committee Democrat Ron Wyden (OR) are...