C IV broad absorption line disappearance in a large SDSS QSO sample D. De Cicco, W. N. Brandt, C. J. Grier, M. Paolillo, N. Filiz Ak, D. P. Schneider and J. R. Trump A&A, 616 (2018) A114 Published online: 30 August 2018 DOI: 10.1051/0004-6361/201732497