Phenotypic overlap between core diagnostic features and emotional/behavioral problems in preschool children with autism spectrum disorder

Stelios Georgiades, Peter Szatmari, Eric Duku, Lonnie Zwaigenbaum, Susan Bryson, Wendy Roberts, Eric Fombonne, Pat Mirenda, Isabel Smith, Tracy Vaillancourt, Joanne Volden, Charlotte Waddell, Ann Thompson