In this letter to the editor, the authors comment on an earlier article they had published, "Density and Physical Current Density Functional Theory" (Pan, X.-Y. and Sahni, V. (2010), Density and physical current density functional theory. Int. J. Quantum Chem., 110: 2833–2843. doi: 10.1002/qua.22862).
X. Y. Pan, V. Sahni, Int. J. Quantum Chem. 2014, 114, 233–236. doi: 10.1002/qua.24532