RT Journal Article SR Electronic T1 Emerich v. Philadelphia Center for Human Development: The new duty to warn in Pennsylvania JF Journal of the American Academy of Psychiatry and the Law Online JO J Am Acad Psychiatry Law FD American Academy of Psychiatry and the Law SP 309 OP 313 VO 27 IS 2 A1 Wettstein, RM YR 1999 UL http://jaapl.org/content/27/2/309.abstract AB