Comment on: “Lorentz violation in high-energy ions” by Santosh Devasia G. Saathoff, S. Reinhardt, R. Holzwarth, T.W. Hänsch, Th. Udem, D. Bing, D. Schwalm, A. Wolf, S. Karpuk, G. Huber et al. (7 more) Eur. Phys. J. C, 71 3 (2011) 1596 Published online: 17 March 2011 DOI: 10.1140/epjc/s10052-011-1596-3