KING OF PRUSSIA, Pa.--(BUSINESS WIRE)--Data from a European multicenter (non-IND study) showing that patients with PI who switched to IgPro20 from previously available SCIg formulations achieved comparable IgG trough levels without dosage adjustment, resulting in significantly less administration volume. The data were presented at the American Academy of Allergy, Asthma & Immunology (AAAAI) Annual Meeting in New Orleans, US.