  In their recent paper (Inter. J. Mod. Phys. A 26 (2011) 1011), Zarrinkamar
and coauthors have considered the radial Dirac equation for a Coulomb scalar,
vector and tensor interaction. The exact solutions for the energy eigenvalues
they have reported for spin-symmetry and pseudo-spin symmetry were mishandled
and are incorrect eigenvalues, therefore.
