TY - JOUR T1 - Online-only: Parents often in the dark about teens’ whereabouts, study finds JF - The Nation's Health JO - Nations Health SP - E13 LP - E13 VL - 42 IS - 3 AU - Teddi Dineley Johnson Y1 - 2012/04/01 UR - http://www.thenationshealth.org/content/42/3/E13.abstract N2 - “It’s 10 o’clock — do you know where your children are?” is a public service announcement used by many television stations for more than three decades. While the question seems simple enough, the answer might come as a surprise to many parents, according to a new study. ER -