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Schematic flow-chart of the breakdown of probands and relatives with TGIF alterations. * Two probands (#17a, #18a) have the same functionally significant variant; 2 patients (#5a, #6a) have the same variant not shown to be functionally significant. ⁁ Patient #6a has 2 variants, 1 maternal, and 1 paternal, though only the paternal variant is thought to be of functional significance.
