From The Bob Langer and Polaris Family Tree: From Acusphere to Momenta to Visterra:

Langer-Polaris company tree: Therapies (image: Polaris)
Langer-Polaris company tree: Therapies (image: Polaris)

18-year partnership between MIT’s Bob Langer (and collaborators) and Polaris Venture Partners’ Terry McGuire (and partners)