Biallelic mutation of ARHGEF18, involved in the determination of epithelial apicobasal polarity, causes adult-onset retinal degeneration by Arno, G, Carss, KJ, Hull, S, Zihni, C, Robson, AG, Fiorentino, A, UK Inherited Retinal Disease Consortium, Hardcastle, AJ, Holder, GE, Cheetham, ME, Plagnol, V, NIHR Bioresource - Rare Diseases Consortium, Moore, AT, Raymond, FL, Matter, K, Balda, MS, Webster, AR