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Compilation of 2 comments on S. L. Adler, "Vacuum Birefringence in a RotatingMagnetic Field", J.Phys. A40 (2007) F143-F152, hep-ph/0611267 and S. Biswas andK. Melnikov, "The Rotation of magnetic field does not impact vacuumbirefringence", Phys. Rev. D75 (2007) 053003, hep-ph/0611345, hope it has someusefulness.

Comments on "Vacuum Birefringence in a Rotating Magnetic Field" [S. L.  Adler, J. Phys. A40 (2007) F143-F152] and "The Rotation of magnetic field  does not impact vacuum birefringence" [S. Biswas and K. Melnikov, Phys. Rev.  D75 (2007) 053003]