NPPB and type 2 diabetes mellitus: BMI, NYHA class, LVEF, ceruloplasmin, NT‐proBNP, duration of symptoms before inclusion increase, Na, creatinine clearance, albumin, HDL cholesterol, fibrinogen, uric acid, bilirubin, alkaline phosphatase, gamma‐glutamyl transpeptidase, type 2 diabetes, ICD, ACEI or/and ARB, loop diuretics, thiazide diuretics, statins and digitalis