The doll was expected to be available at Mattel's online shop and at Target stores starting Monday for a suggested retail price of $11.87.Mattel Inc. is introducing an autistic Barbie on Monday as the newest member of its line intended to celebrate diversity, joining a collection that already includes Barbies with Down syndrome, a blind Barbie, a Barbie and a Ken with vitiligo, and other models the toymaker added to make its fashion dolls more inclusive. Mattel said it developed the autistic doll over more than 18 months in partnership with the Autistic Self Advocacy Network, a nonprofit organization that...