Linkage analysis of extremely discordant and concordant sibling pairs identifies QTL that influence variation in a human personality trait. by Fullerton, J, Cubin, M, Bhomra, A, Davidson, S, Miller, S, Turn, M, Dolby, C, Mott, R, Wang, C, Tiwari, H, Allison, D, Neale, M, Fairburn, C, Goodwin, G, Flint, J