Publications by authors named "Gregory P Levin"

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An evaluation of inferential procedures for adaptive clinical trial designs with pre-specified rules for modifying the sample size.
Gregory P Levin, Sarah C Emerson, Scott S Emerson

Biometrics· September 2014

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Estimating mean annual 25-hydroxyvitamin D concentrations from single measurements: the Multi-Ethnic Study of Atherosclerosis.
Michael C Sachs, Abigail Shoben, Gregory P Levin, Cassy Robinson-Cohen, Andrew N Hoofnagle

Am J Clin Nutr· June 2013

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Adaptive clinical trial designs with pre-specified rules for modifying the sample size: understanding efficient types of adaptation.
Gregory P Levin, Sarah C Emerson, Scott S Emerson

Stat Med· April 2013

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Genetic variants modifying the influence of vitamin D--reply.
Gregory P Levin, Bryan Kestenbaum

JAMA· March 2013

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Genetic variants and associations of 25-hydroxyvitamin D concentrations with major clinical outcomes.
Gregory P Levin, Cassianne Robinson-Cohen, Ian H de Boer, Denise K Houston, Kurt Lohman

JAMA· November 2012

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Comments on 'Adaptive increase in sample size when interim results are promising: a practical guide with examples'.
Scott S Emerson, Gregory P Levin, Sarah C Emerson

Stat Med· December 2011

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Allopurinol and mortality in hyperuricaemic patients.
Andrew J Luk, Gregory P Levin, Elya E Moore, Xiao-Hua Zhou, Bryan R Kestenbaum

Rheumatology (Oxford)· July 2009

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