Autoantibodies to cardiac beta1-adrenoceptors and M2-muscarinic receptors are present at low frequencies and low titers in healthy subjects, with prevalence increasing with age, providing a baseline for comparison with dilated cardiomyopathy patients.
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Establishes prevalence baseline in healthy subjects; leaves open diagnostic specificity in cardiomyopathy without age-matched controls.
Liu et al. (1999) studied this question.
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