Familial high ASD risk differs from a low risk cohort by longer segment lengths and potential reduced branching in early but not later branch generations. (September 2016) - Schubert, David; Leonard, Alexander; Lee, Jonathan; Morgan, Simon; Vvedensky, Dimitri; Newschaffer, Craig; Shah, Ruchit; Miller, Richard; Katzman, Philip; Moye, John; Salafia, Carolyn