By LINDA STEWART BALL
Associated Press Writer
DALLAS – Luci Baines Johnson, the youngest daughter of former President Lyndon Johnson, is being treated at the Mayo Clinic for what doctors suspect is a rare autoimmune disorder that affects the nervous system, her personal physician said Saturday.
Johnson, 62, who was flown by air ambulance to the clinic in Rochester, Minn., on Friday, remained in the neuro-intensive care unit, said Dr. Dudley Youman, her doctor in Austin and a family friend.
Initially, Johnson was admitted to a hospital in Austin, Texas, on Wednesday after experiencing “extreme weakness” in her arms and legs, Youman said.