Liu, KY;    Stringer, AE;    Reeves, SJ;    Howard, RJ;      (2018)    The neurochemistry of agitation in Alzheimer's disease: a systematic review.                   Ageing Research Reviews , 43    pp. 99-107.    10.1016/j.arr.2018.03.003 <https://doi.org/10.1016/j.arr.2018.03.003>.       Green open access