PITTSBURGH (AP) — A Pennsylvania eighth-grader who became ill after smoking synthetic marijuana and had a double lung transplant has died.Tonya Rice tells the Pittsburgh Tribune-Review (http://bit.ly/tk0Vod ) that her 13-year-old son, Brandon, died Thursday morning at Children's Hospital of Pittsburgh at UPMC.The boy smoked the fake marijuana out of a plastic PEZ candy dispenser. The chemicals in the drugs caused extensive damage to his lungs. Brandon was put on a respirator in June and had a double lung transplant in September.The boy's mother says anti-rejection drugs he'd taken since the transplants weakened his immune system and made him unable to fight a recent infection.Gov. Tom Corbett signed a law outlawing such substances in Pennsylvania a few days after the boy smoked the substances. The ban took effect in August.___Information from: Pittsburgh Tribune-Review, http://pghtrib.com