SCD families with UBIAD1 p.G177E. A-F: SCD Swede-Finn families A-D, Japanese Family JJ, and Turkish Family W, respectively. Circles indicate females; squares, males; filled symbols, affected individuals; horizontal white line in a filled symbol, cornea transplant surgery (penetrating keratoplasty); vertical line, clinically or self-reported negative for SCD but positive for a p.G177E mutation; E1, clinical examination: (+) affected, (−) unaffected; E2, genetic analysis: (+) G>A alteration, (−) wild type; asterisks, examined by J.S.W.