From Name: From Email: To Name: To Email: Optional Message: Blood brothers: Volunteers lend an arm to med students from The Patriot-News Matthew Johnson took a deep breath as YTI Career Institute student Marissa Arena tightened the rubber band around his bicep. "You're good at this, right?" he asked, chuckling as Arena leaned in and rubbed her finger over his arm to check for veins. Johnson, a computer systems specialist student, was one of several volunteers who helped about 12 medical assistant students complete a graduation requirement: 43 successful needle sticks on a live person. more 7701 Las Colinas Blvd., Ste. 800, Irving, TX 75063