A double-blind placebo-controlled randomized trial of Melissa officinalis oil and donepezil for the treatment of agitation in Alzheimerʼs disease - Burns, A; Perry, E; Holmes, C; Francis, P; Morris, J; Howes, M J; Chazot, P; Lees, G; Ballard, C (Dement Geriatr Cogn Disord, 2012)