EAU CLAIRE, Wis. (AP) – An Eau Claire pediatrician is accused of sexually assaulting a 16-year-old male patient.  Eau Claire police say the doctor has been arrested on a possible charge of second-degree sexual assault and exposing himself. Authorities began an investigation Aug. 31 after the boy’s parents told police their son was sexually assaulted during a medical exam at Mayo Clinic Health System in Eau Claire.  The health care provider issued a statement saying the doctor was terminated Sept. 12. The statement said other patients expressed concern after the pediatrician was fired and those reports are being investigated.