COL1A1 and osteogenesis imperfecta: In our study, we analyzed 30 unrelated OI patients for the COL1A1,COL1A2, P3H1, CRTAP, PPIB,SERPINH1, SERPINF1, FKBP10, SP7,WNT1 and IFITM5 genes through SSCP screening, NGS genepanel and Sanger sequencing.