Janssen L, Keppens C, De Deyn PP, Van Dam D. Late age increase in soluble amyloid-beta levels in the APP23 mouse model despite steady-state levels of amyloid-beta-producing proteins. Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease. 2016 Jan;1862(1):105–12. doi: 10.1016/j.bbadis.2015.10.027.