January 20, 2015 6:35 pm 3-D Knee: A New Implant Doreen Gentzler has details on how 3-D printers are being used to heal knee pain. 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