2026-06-26T05:31:04Z www.treebase.org/treebase-web/top/oai TreeBASE repository www.treebase.org/treebase-web/top/oai 2.0 youjun.guo@yale.edu 1995-11-04T00:00:00Z transient YYYY-MM-DDThh:mm:ssZ oai TreeBASE.org : TreeBASE.org/study/TB2:s6705