The mean star-forming properties of QSO host galaxies D. J. Rosario, B. Trakhtenbrot, D. Lutz, H. Netzer, J. R. Trump, J. D. Silverman, M. Schramm, E. Lusso, S. Berta, A. Bongiorno et al. (15 more) A&A, 560 (2013) A72 Published online: 06 December 2013 DOI: 10.1051/0004-6361/201322196