The group calls for the retraction of six publications by surgeon Paolo Macchiarini regarding the synthetic trachea transplantations that led to the death of at least three patients.
The embattled thoracic surgeon is dealt another blow by his former employer, which is calling for the retraction of one of his papers on artificial esophagus research.
The Karolinska Institute has rejected the conclusions of an earlier, independent investigation, finding regenerative medicine researcher Paolo Macchiarini not guilty of scientific misconduct.