Also, in a study of collagen XVII and BPAG1 autoantibodies in the serum of 337 individuals with no signs of BP [63], of the 25 found to be positive, 5 had neurologic diseases listed in their medical records; in all but one case the amount of collagen XVII antibodies was greater than the amount for BPAG1 (correspondence [64]). Here, DST is linked to nervous system disorder.