Upregulation by retinoic acid of transforming growth factor-beta-stimulated heat shock protein 27 induction in osteoblasts: involvement of mitogen-activated protein kinases. - Hatakeyama,D.; Kozawa,O.; Niwa,M.; Matsuno,H.; Ito,H.; Kato,K.; Tatematsu,N.; Shibata,T.; Uematsu,T. (Biochim Biophys Acta, 2002)