IN BRIEF: The Hospital Authority awarded the Mercy Heart Clinic for uninsured patients a $50,000 primary care grant to enable them to open for an additional day during the week. The Hospital Authority Board, which met on Tuesday at Rockdale Medical Center, also granted a $5,000 grant to the Care and Counseling Center, a program with Conyers First Presbyterian and Conyers First United Methodist for mental health services. The Helping Hands Clinic, a medical clinic for uninsured patients, reportedly withdrew their application for more information. - The board also voted to create an