Polatuzumab vedotin plus bendamustine and rituximab or obinutuzumab in relapsed/refractory follicular lymphoma: a phase Ib/II study oleh Christopher R. Flowers, Matthew J. Matasar, Alex F. Herrera, Mark Hertzberg, Sarit Assouline, Judit Demeter, Andrew McMillan, Amitkumar Mehta, Stephen Opat, Marek Trnňný, Lisa Musick, Jamie Hirata, Annie Yang, Laurie H. Sehn