Comment on "Universal Charge-Radius Relation for Subatomic and   Astrophysical Objects" by Jes Madsen, arXiv:0804.2140, Phys.Rev.Lett.100,   151102 (2008)
  This paper has been withdrawn by the authors after discussing its content with Dr. J. Madsen. 
K. S. Cheng, T. Harko, A. E. Shabad