Poor functional antibody responses are present in nearly all patients with chronic lymphocytic leukaemia, irrespective of total IgG concentration, and are associated with increased risk of infection. (28th April 2015) - Parry, Helen M.; Birtwistle, Jane; Whitelegg, Alison; Hudson, Chris; McSkeane, Tina; Hazlewood, Peter; Mudongo, Nyasha; Pratt, Guy; Moss, Paul; Drayson, Mark T.; Murray, Jim; Richter, Alex G.