sentence: A highly concentrated IgG formulation such as the IGSC 20 % product investigated in this study would offer patients with PIDD a new replacement therapy option with fewer infusion sites and shorter infusion durations compared with other conventional IGSC products.In this trial , weekly IGSC 20 % treatment at monthly doses equivalent to those administered with IGIV 10 % or IGSC 16 % , was efficacious in preventing infections .