Linkage analysis of extremely discordant and concordant sibling pairs identifies QTL that influence variation in a human personality trait. - Fullerton, J; Cubin, M; Bhomra, A; Davidson, S; Miller, S; Turn, M; Dolby, C; Mott, R; Wang, C; Tiwari, H; Allison, D; Neale, M; et al. (AMERICAN JOURNAL OF HUMAN GENETICS, 2002)