title: Comment on "Physical picture for light emission in scanning tunneling microscopy".
authors.affiliation: Department of Theoretical Physics, University of Lund, Solvegatan 14 A, S-223 62 Lund, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Johansson
authors.forename: R
authors.initials: R
authors.lastname: Berndt
authors.forename: J K
authors.initials: JK
authors.lastname: Gimzewski
authors.forename: S P
authors.initials: SP
authors.lastname: Apell