To the Editor: A 63-year-old woman presented with polyuria, polydipsia, lethargy and vomiting. Two weeks previously, she had been diagnosed as having diffuse scleroderma with possible interstitial lung disease, and had started taking 50 mg prednisolone daily. Her past history included diabetes, hypertension, hypercholesterolaemia and β-thalassemia trait, and her other medications were metformin, glibenclamide, quinapril and amlodipine.
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