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Percentages of intermediate and high SYNTAX score in patients with different Frank’s sign scores. The ear creases significantly associated with intermediate and high SYNTAX score, as VC-EF and CC-NEH were used to calculated the Frank’s sign scores. Each ear crease of LVC-EF, RVC-EF, LCC-NEH, RCC-NEH was scored as 1 point, then the patients could have 0–4 points according to the ear creases, and the total score was the Frank’s sign score.
