HGTree: database of horizontally transferred genes determined by tree reconciliation. - Hyeonsoo Jeong; Samsun Sung; Taehyung Kwon; Minseok Seo; Kelsey Caetano-Anollés; Sang Ho Choi; Seoae Cho; Arshan Nasir; Heebal Kim (Nucleic Acids Res., 2016)