The microscopic hardness of bone.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology; D001847:Bone Diseases / Q000473:pathology; D001842:Bone and Bones; D002648:Child; D002675:Child, Preschool; D005260:Female; D006244:Hardness; D006801:Humans; D008297:Male; D008852:Microradiography; D008853:Microscopy; D008875:Middle Aged