The relation between vitamin A (VA) nutritional status and the metabolism of all-trans-retinoic acid (RA) is not well understood. In this study, we determined the tissue distribution and metabolism of a test dose of [(3)H]-RA in rats with graded, diet-dependent, differences in VA status. The design included 3 groups, designated VA-deficient, VA-marginal, and VA-adequate, with liver total retino...

Among Veterans, heart failure (HF) contributes to frequent emergency department visits and hospitalization. Dual health care system use (dual use) occurs when Veterans Health Administration (VA) enrollees also receive care from non-VA sources. Mounting evidence suggests that dual use decreases efficiency and patient safety. This qualitative study used constructivist grounded theory and content ...

PURPOSE The Titmus Stereotest (Stereo Optical Co., Inc., Chicago, IL) has been used to estimate visual acuity (VA) in the evaluation of nonorganic visual loss. Previous predictions were derived from optical degradation of VA in normal subjects and may not account for the variability seen in patients with neuro-ophthalmic pathologies included in the differential diagnosis of nonorganic visual lo...

We employ the impulse approximation for a description of positronium-atom scattering. Our analysis and calculations of Ps-Kr and Ps-Ar collisions provide a theoretical explanation of the similarity between the cross sections for positronium scattering and electron scattering for a range of atomic and molecular targets observed by S. J. Brawley et al. [Science 330, 789 (2010)].

CardioVascular Research Center, GeneSys Research Institute, Boston, MA, USA Center of Cancer Systems Biology, GeneSys Research Institute, Boston, MA, USA Tufts University School of Medicine, Boston, MA, USA *Corresponding author. GeneSys Research Institute, 736 Cambridge Street, CBR-340, Brighton, MA 02135, USA. Tel: +1-617-789-3143; Fax: +1-617-562-7943; Email: [email protected], davi...

1 From the Department of Diagnostic Radiology, Yale University School of Medicine, 789 Howard Ave, TE 2, New Haven, CT 06520-8042. From the 2002 RSNA scientific assembly. Received February 2, 2003; revision requested April 21; revision received July 12; accepted August 22. Address correspondence to A.K. (e-mail: arjun [email protected]). © RSNA, 2004 Implementation of an International Telerad...

BACKGROUND Veterans who are hospitalized in both VA and non-VA hospitals within a short timespan may be at risk for fragmented or conflicting care. To determine the characteristics of these "dual users," we analyzed administrative hospital discharge data for VA-enrolled veterans of any age in seven states, including any VA or non-VA hospitalizations they had in 2004-2007. METHOD For VA enroll...

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