BodyMap-Xs: anatomical breakdown of 17 million animal ESTs for cross-species comparison of gene expression. - Osamu Ogasawara; Makiko Otsuji; Kouji Watanabe; Takayasu Iizuka; Takuro Tamura; Teruyoshi Hishiki; Shoko Kawamoto; Kousaku Okubo (Nucleic Acids Res., 2006)