PTH1R and osteosarcoma: According to Li et al, PTHR1 may exert important influence on progression of osteosarcoma by activating miRNA genes miR‐124‐3‐p‐AR‐Tgfb1i1, miR‐a‐3p‐PPARG‐27 Abca1 and miR‐103/590‐3p‐AXIN2.47