  The appearance of terms, which are analogous to ones required for symmetry
breaking, in Lagrangian of Ref. [1] is shown to be caused by gauge invariance
of quantum electrodynamics (QED) and by inaccuracy of the cited author in the
choice of canonical variables. These terms do not have physical significance
within modern quantum electrodynamics. PACS: 03.50.De, 04.20.Cv, 04.20.Fy,
11.10.Ef.
