Exome sequencing analysis identifies rare variants in ATM and RPL8 that are associated with shorter telomere length by van der Spek, A, Warner, SC, Broer, L, Nelson, CP, Vojinovic, D, Ahmad, S, Arp, PP, Brouwer, RWW, Denniff, M, van den Hout, MCGN, van Rooij, JGJ, Kraaij, R, van IJcken, WFJ, Samani, NJ, Ikram, MA, Uitterlinden, AG, Codd, V, Amin, N, van Duijn, CM