Methods Two hundred and sixty-five normal male and female subjects whose ages ranged from 4 to 8o years were studied. Their age distribution stratified in three groups, up to I4 years, I5 to 29 years, 30 years and over, is shown in Table I. Each patient was assessed as normal on the basis of physical, radiological, and conventional 12 lead electrocardiographic examination. Three lead electrocar...

Platelets sequester angiogenesis regulatory proteins early in tumor growth, which suggests a new avenue for monitoring disease. To date, there are no clinically relevant reference ranges for markers of early angiogenesis. We introduce a new ELISA-based method for accurate and reproducible measurement of vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), platelet f...

B and T lymphocytes separation by use of various cell markers had been previously described. These differential lymphocyte subpopulation counts have been helpful in elucidating immunodeficiency, lymphoproliferative and other disease states. Expanding clinical utility has moved these assays into the general laboratory for routine determination. Specific methodology for differentiation of B and T...

We verify a conjecture on the structure of higher-rank numerical ranges for a wide class of unitary and normal matrices. Using analytic and geometric techniques, we show precisely how the higher-rank numerical ranges for a generic unitary matrix are given by complex polygons determined by the spectral structure of the matrix. We discuss applications of the results to quantum error correction, s...

attached to an external detector system, the thyroid uptake of iodine was measured at 6 and 24 hr. The external detector consisted of a 1Â1⁄4x 1 in. NaI(Tl) scintillation crystal and a flat-field lead collimator. A Lucite extension of the collimator was shaped to fit the neck and assure good geometry with a neck-to crystal distance of 20 cm. A standard neck phantom was used with standard capsul...