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Frequencies of different vertebral patterns for fetuses with malformations of a particular germ-layer, i.e. endoderm, mesoderm, ectoderm. Vertebral patterns are indicated with R, LS, TL, TL_LS, CT, CT_LS, CT_TL, CT_TL_LS, see Fig. 2 for an explanation. There is no significant effect of the germ-layer of origin on the frequencies of vertebral patterns
