[1]. Monti JM, et al. Effects of the 5-HT6 receptor antagonists SB-399885 and RO-4368554 and of the 5-HT(2A) receptor antagonist EMD 281014 on sleep and wakefulness in the rat during both phases of the light-dark cycle. Behav Brain Res. 2011 Jan 1;216(1):381-8.