"MGB has relentlessly become more and more corporate in the way they manage their physicians," Michael Barnett, MD, a primary care physician and associate professor of health policy and management at the Harvard T.H. Chan School of Public Health, said, according to the publication.

In the latest sign of mounting strain on medical workers, nearly 300 primary care physicians employed by Mass General Brigham have notified federal authorities that they want to join a union, citing "burnout" and the "corporatization of medicine" at the state's largest health system.