. . . . . . . . . . . . . "cat(p(PFR:\"Pde4 Family\")) -| bp(GO:\"osteoblast differentiation\")" . "Approximately 61,000 statements." . "Copyright (c) 2011-2012, Selventa. All rights reserved." . "BEL Framework Large Corpus Document" . . "1.4" . "inhibitors of phosphodiesterase (PDE)4 isoenzyme increase osteoblast formation in an in vitro bone marrow culture system and inhibit bone loss in animal osteoporosis models" . . "Selventa" . . . . "2014-07-03T14:30:15.885+02:00"^^ . . .