Mingyao Li Kai Wang Struan F. A. Grant Hakon Hakonarson Chun Li ATOM: a powerful gene-based association test by combining optimally weighted markers. 497-503 2009 25 Bioinformatics 4 http://dx.doi.org/10.1093/bioinformatics/btn641 db/journals/bioinformatics/bioinformatics25.html#LiWGHL09