Gary R Stevens

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BACKGROUND Serum cystatin C (Cys C) has been proposed as a simple, accurate, and rapid endogenous marker of glomerular filtration rate (GFR) in research and clinical practice. However, there are conflicting reports regarding the superiority of Cys C over serum creatinine (Cr), with a few studies suggesting no significant difference. METHODS We performed a(More)
With increasing donor organ shortages, en-bloc kidney (EBK) transplantation is an alternative to utilize very young or very old donor age cadaver kidneys for transplantation. Several single-center series have reported excellent graft survival (GS). We sought to determine national level registry-based patterns for GS and determine adjusted hazard ratios(More)
STUDY OBJECTIVE To determine whether an interaction exists between acetaminophen and warfarin that alters the international normalized ratio (INR). DESIGN Prospective, randomized, double-blind, placebo-controlled trial. SETTING Anticoagulation clinic at a Veterans Affairs Medical Center. PATIENTS Thirty-six adult patients receiving warfarin with(More)
OBJECTIVE To radiographically evaluate the Zurich cementless total hip (ZCTH) cup and correlate lucency with clinical signs of implant instability, time since surgery, and implant generation, using zonal analysis. STUDY DESIGN Retrospective study. ANIMALS Client-owned dogs (n = 53). METHODS Radiographs of dogs that had ZCTH arthroplasty (>1 year) were(More)
The role of osmolality of contrast media (CM) in the development of post-ERCP pancreatitis (PEP) is debated. We therefore performed a metanalysis to determine whether osmolality affects the incidence of PEP. A literature search of English-language studies was performed using computerized databases and manual searching of abstracts and article(More)
The adjusted relative risk (aRR) for development of post-transplant lymphoproliferative disorder (PTLD) is higher in kidney transplant recipients receiving monoclonal antibody induction therapy, but the aRR between the different available polyclonal agents has not been investigated in detail. We analyzed data from the United Network of Organ Sharing(More)
This study evaluated the relationship between blood iron parameters and hepatic iron concentrations, and correlation of histologic findings with hepatic iron concentrations in a captive population of Egyptian fruit bats (Rousettus aegyptiacus) and island flying foxes (Pteropus hypomelanus). Blood samples were collected for complete blood counts, plasma(More)
PURPOSE To assess the efficacy, predictability, and safety of LASIK for the surgical correction of low to moderate hyperopia and hyperopic astigmatism using the NIDEK EC-5000 excimer laser. METHODS In a multicenter United States Food and Drug Administration (FDA) regulated study of LASIK, 7 centers enrolled 293 eyes with manifest refraction sphere that(More)
RATIONALE AND OBJECTIVE This clinical trial examined the pharmacokinetics of gadoversetamide, a magnetic resonance imaging contrast agent, in normal pediatric subjects. MATERIALS AND METHODS Seventeen healthy pediatric subjects received a single intravenous injection of gadoversetamide (0.1 mmol/kg, 0.2 mL/kg). Sixteen subjects that were evaluable for(More)
The pharmacokinetic parameters, safety, and tolerability of OptiMARK (gadoversetamide injection), a gadolinium-based magnetic resonance imaging (MRI) contrast agent, were evaluated in 163 subjects with either central nervous system (CNS) or liver pathology with and without renal insufficiency, for which a contrast-enhanced MRI was indicated. A multicenter,(More)