The mammalian gene function resource: the International Knockout Mouse Consortium. - Bradley A; Anastassiadis K; Ayadi A; Battey JF; Bell C; Birling MC; Bottomley J; Brown SD; Bürger A; Bult CJ; Bushell W; Collins FS; et al. (Mammalian genome : official journal of the International Mammalian Genome Society, 2012)