Correction: Activated T-Follicular Helper 2 Cells Are Associated With Disease Activity in IgG4-Related Sclerosing Cholangitis and Pancreatitis. Issue 7 (July 2019) - Cargill, Tamsin; Makuch, Mateusz; Sadler, Ross; Lighaam, Laura C.; Peters, Rory; van Ham, Marieke; Klenerman, Paul; Bateman, Adrian; Rispens, Theo; Barnes, Eleanor; Culver, Emma L.