Different responsiveness to mechanical stress of bone cells from osteoporotic versus osteoarthritic donors. - Bakker AD; Klein-Nulend J; Tanck E; Heyligers IC; Albers GH; Lips P; Burger EH (Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2006)