. . . . . . . . . "a(SCHEM:Tretinoin) -> bp(GOBP:\"osteoblast differentiation\")" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "20131211" . "RA, a known osteoblast differentiating agent(9)" . . "Selventa" . . . . "2014-07-03T14:33:45.861+02:00"^^ . . .