— Dr. Steve Johnson has seen a lot of changes in Cleburne in 40 years. “The town certainly has grown. There’s a lot more diversification of industry in the community,” he said. “The whole community seems to be growing as part of the Metroplex.” Johnson, too, is undergoing a big change. The 68-year-old will retire at the end of this month from Family Medicine Associates, the clinic he co-founded with Dr. J. Mike White in 1980. Johnson’s journey to Cleburne in 1970 by way of Ar