Philipson O, Hammarstrom P, Nilsson KP, Portelius E, Olofsson T, Ingelsson M, Hyman BT, Blennow K, Lannfelt L, Kalimo H and Nilsson LN (2007). A highly insoluble state of abeta similar to that of alzheimer's disease brain is found in arctic app transgenic mice. Neurobiol Aging; 30: 1393-1405.