Assertion: osteoblast | /r/CapableOf | raise the question
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Source sentences:
text: These observations indicate that osteoblasts and the endosteum (the interface of bone and marrow where osteoblasts and osteoclasts localize) regulate HSC function and raise the question of whether HSCs localize to the endosteum itself or whether they are influenced at a distance (directly or indirectly) by extracellular factors that diffuse from the endosteum.