Revised statistics of radio halos and the reacceleration model R. Cassano, G. Brunetti, T. Venturi, G. Setti, D. Dallacasa, S. Giacintucci and S. Bardelli A&A, 480 3 (2008) 687-697 Published online: 09 January 2008 DOI: 10.1051/0004-6361:20078986