IFITM5 and osteogenesis imperfecta type 5: There have been five genetic variants in BRIL reported so far: c.-14C>T (p.M1ext-5) [4,5] in OI type V; c.119C>T (p.S40L) [6,7] and c.119C>G (p.S40W) [8,9] in atypical type VI; and the following two most recent that have not yet been classified (c.143A>G (p.N48S) [10] and c.-9C > A (p.M1ext-3) [11]).