Increased number of plasma B cells producing autoantibodies against Abeta42 protofibril in Alzheimer’s disease Manuscript Number: 15-0236R1 Author(s): RoseMarie Brundin, Lena Kilander, Lars Lannfelt, Staffan Paulie, Frida Ekholm Pettersson, Dag Sehlin, Sofia Sollvander, Gabriel Westman