Gerald Cooper

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An enzymatic hydrolysis isotope dilution-mass spectrometric method was developed for reference quantification of specific proteins. The analytical procedure involved measuring a reproducibly hydrolyzed peptide (serving as the primary standard) unique to a specific protein. This new mass spectrometric method was evaluated by assessing the concentration of(More)
All identified Israeli patients with amyotrophic lateral sclerosis (ALS) with onset of the disease from 1959 through 1975 (n=318) were evaluated clinically. Most of our patients (63%) presented with weakness; only 10% presented with atrophy and 3% with fasciculations. In 31% of the cases, the onset of the disease was focal and 22% of the patients presented(More)
BACKGROUND Accurate and precise measurement of blood cholesterol plays a central role in the National Cholesterol Education Program's strategy to reduce the morbidity and mortality attributable to coronary heart disease. Matrix effects hamper the ability of manufacturers to adequately calibrate and validate traceability to the National Reference System for(More)
To obtain the best estimates of the average intraindividual biological variability (CVb) in the concentrations of total cholesterol (TC), low-density lipoprotein cholesterol (LDLC), high-density lipoprotein cholesterol (HDLC), and triglyceride serum lipids in a person's blood, we evaluated results from 30 studies published from 1970 to 1992. The usually(More)
In 1975 the Centers for Disease Control, in cooperation with the American Association for Clinical Chemistry Cholesterol Reference Method Study Group, began an investigation to develop a reference method for total cholesterol. Five potential reference methods were compared with the definitive method developed by the National Bureau of Standards before the(More)
Many studies of atherosclerosis have indicated hyperlipidaemia as a predisposing factor to vascular disease. The relationship holds even for mild degrees of hyperlipidaemia, a fact that underlines the importance of this category of disorders. Both primary and secondary hyperlipidaemias represent such a variety of abnormalities that an internationally(More)
Accurate laboratory measurement of serum cholesterol has become a national public health priority. National proficiency testing surveys indicate that laboratory inaccuracy in cholesterol testing is more of a problem than precision. Like precision, accuracy is a function of multiple pre-analytical and analytical sources of variation. Controlling(More)