Simmonds J P, Lister J
Postgrad Med J. 1978 Aug;54(634):552-4. doi: 10.1136/pgmj.54.634.552.
Identical male twins are described, one of whom presented with clinical symptoms of Addison's disease whereas the other was shown to have a deficient adrenal cortical response to stimulation tests. Both had positive adrenal cortex antibodies.