Employing a precise and sensitive double-isotope derivative technique, plasma catecholamine concentration (PCA) was measured in four groups of subjects: (a) long-term diabetics with neuropathy, (b) long-term diabetics without neuropathy, (c) hypophysectomized long-term diabetics with neuropathy, and (d) nondiabetic control subjects. Blood samples were obtained from subjects in the supine and in the standing position.
Niels Juel Christensen
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