“…It has been estimated that the R206H mutation contributes to more than 95% of FOP patients [20,24]. The remaining cases can be attributed to atypical ACVR1 mutations, including L196P [41,42], P197_F198delinsL [24], R202I [43,44], Q207E [24], F246Y [45], R258S [28,31,33,35,46], R258G [16], G325A [47], G328E [24,34,43,48], G328R [24], G328W [24], G356D [24,33,49], and R375P [24].…”