TNFRSF11A and Bartsocas-Papas syndrome 1: Between different experimental groups at the same age: for 30 days of age, the relative expression of RANK mRNA in the thoracic vertebrae of the CHF and BPs groups was lower than that of the NC group, and the BPs-M group was significantly higher than that of the CHF-H and BPs-H groups (p < 0.05).