Efficacy and safety of idelalisib in patients with relapsed, rituximab- and alkylating agent-refractory follicular lymphoma: a subgroup analysis of a phase 2 study oleh Gilles Salles, Stephen J. Schuster, Sven de Vos, Nina D. Wagner-Johnston, Andreas Viardot, Kristie A. Blum, Christopher R. Flowers, Wojciech J. Jurczak, Ian W. Flinn, Brad S. Kahl, Peter Martin, Yeonhee Kim, Sanatan Shreay, Matthias Will, Bess Sorensen, Madlaina Breuleux, Pier Luigi Zinzani, Ajay K. Gopal