Gingerly, Kathleen Thoren's family gathered around her in the intensive care unit, unable to speak to their beloved sister, daughter, wife, or even stroke her hands. The slightest stimulation might create a fatal amount of pressure on the 25-year-old woman's swollen brain, warned the doctors. "We were horrified, but we tried to just quietly be with her," said her sister Erika Klein. "In the end, it didn't help." The mother of three died last fall, just after Thanksgiving, after days of agonizing headaches that the coroner's report said were brought on by hormones released into her system by Ortho Evra,...