January 13, 2012 7:32 pm Health & Fitness Expo: Johns Hopkins Johns Hopkins offers screening and nutrition and fitness advice at the Health & Fitness Expo. Local 2:14 Opioid crisis: National drug take back day on Saturday 2:55 Concussion treatment: Returning to school and limiting screen time may help, study finds 2:39 What to know about ADHD medication and pregnancy 2:08 How to pick the best running shoes for outdoor exercise 3:41 Nail biting: A psychiatrist shares tips