These families help researchers find Alzheimer's treatments. Their network is at risk

June Ward (right) — pictured with her sisters Susie Gilliam (center) and Karen Douthitt (left) — carries a rare gene mutation that virtually guarantees she will get Alzheimer's in the next few years. She is part of a network of more than 200 families with these kinds of gene mutations who have volunteered as research subjects over the past two decades. …