RT Journal Article SR Electronic T1 Addison's disease masked by long term exogenous steroid treatment for presumed polymyalgia rheumatica JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 89 OP 90 DO 10.7861/clinmedicine.12-1-89 VO 12 IS 1 A1 Mike Ankcorn A1 Sath Nag YR 2012 UL http://www.rcpjournals.org/content/12/1/89.abstract