A New Jersey appeals court ruled that errors in admission of expert testimony warrant overturning a $223 million judgment against Johnson & Johnson in suits alleging that its baby powder caused four plaintiffs to develop mesothelioma.

The trial judge “misapplied the well-established gatekeeping procedures required by our courts” when she admitted the testimony of three scientific experts, and the error “was not harmless,” the appeals court ruled in Barden v. Johnson & Johnson.