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Scans showing bone histology of the transversal sections of the 5th lumbar vertebral body of all animal groups. Group 1: baseline; Group 2: control, normal diet; Group 3: calcium-deprived diet for 4 weeks; Group 4: calcium-deprived diet, plus concomitant administration of PTH (1-34) 40 μg/kg/day, for 4 weeks. Scale bar: 500 μm.
