Publications by authors named "Nathan Shaffer"

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Correction: Validating a T1-weighted cine MRI for a 1.5T MR-Linac with temporal resolution appropriate for respiratory motion.
Nathan Shaffer, Alex Dresner, Qi Ying, Eveline Alberts, Marijn Kruiskamp

Front Oncol· November 2025

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Validating a T1-weighted cine MRI for a 1.5T MR-Linac with temporal resolution appropriate for respiratory motion.
Nathan Shaffer, Alex Dresner, Qi Ying, Eveline Alberts, Marijn Kruiskamp

Front Oncol· June 2025

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Surrogate gating strategies for the Elekta Unity MR-Linac gating system.
Samuel D Rusu, Blake R Smith, Joel J St-Aubin, Nathan Shaffer, Daniel Ellis Hyer

J Appl Clin Med Phys· February 2025

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Validation of a rapid algorithm for repeated intensity modulated radiation therapy dose calculations.
Nathan Shaffer, Jeffrey Snyder, Joel St-Aubin

Biomed Phys Eng Express· December 2024

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Anemia in Infants and Children: Evaluation and Treatment.
Meghan F Raleigh, Ashley S Yano, Nathan E Shaffer

Am Fam Physician· December 2024

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WHO's path to elimination of mother-to-child transmission of HIV and syphilis.
Nathan Shaffer, Melanie Taylor, Morkor Newman, Innocent Nuwagira, Francoise Bigirimana

BMJ· February 2020

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Time to first positive HIV-1 DNA PCR may differ with antiretroviral regimen in infants infected with non-B subtype HIV-1.
Raji Balasubramanian, Mary Glenn Fowler, Kenneth Dominguez, Shahin Lockman, Pat A Tookey, Nathan Shaffer

AIDS· November 2017

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Should HIV testing for all pregnant women continue? Cost-effectiveness of universal antenatal testing compared to focused approaches across high to very low HIV prevalence settings.
Naoko Ishikawa, Shona Dalal, Cheryl Johnson, Daniel R Hogan, Takuro Shimbo, Nathan Shaffer

J Int AIDS Soc· July 2017

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The Effect of a Continuous Quality Improvement Intervention on Retention-In-Care at 6 Months Postpartum in a PMTCT Program in Northern Nigeria: Results of a Cluster Randomized Controlled Study.
Bolanle Oyeledun, Abimbola Phillips, Frank Oronsaye, Oluwafemi David Alo, Nathan Shaffer

J Acquir Immune Defic Syndr· June 2017

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Using Small Tests of Change to Improve PMTCT Services in Northern Nigeria: Experiences From Implementation of a Continuous Quality Improvement and Breakthrough Series Program.
Bamidele Osibo, Frank Oronsaye, Oluwafemi D Alo, Abimbola Phillips, Renaud Becquet, Nathan Shaffer

J Acquir Immune Defic Syndr· June 2017

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Missed Opportunities along the Prevention of Mother-to-Child Transmission Services Cascade in South Africa: Uptake, Determinants, and Attributable Risk (the SAPMTCTE).
Selamawit Woldesenbet, Debra Jackson, Carl Lombard, Thu-Ha Dinh, Adrian Puren, Nathan Shaffer

PLoS One· May 2016

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Impact of Maternal HIV Seroconversion during Pregnancy on Early Mother to Child Transmission of HIV (MTCT) Measured at 4-8 Weeks Postpartum in South Africa 2011-2012: A National Population-Based Evaluation.
Thu-Ha Dinh, Kevin P Delaney, Ameena Goga, Debra Jackson, Carl Lombard, Nathan Shaffer

PLoS One· February 2016

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Correction: Impact of Maternal HIV Seroconversion during Pregnancy on Early Mother to Child Transmission of HIV (MTCT) Measured at 4-8 Weeks Postpartum in South Africa 2011-2012: A National Population-Based Evaluation.
Thu-Ha Dinh, Kevin P Delaney, Ameena Goga, Debra Jackson, Carl Lombard, Nathan Shaffer

PLoS One· September 2015

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Implementation and Operational Research: Reconstructing the PMTCT Cascade Using Cross-sectional Household Survey Data: The PEARL Study.
Benjamin H Chi, Pius M Tih, Arianna Zanolini, Kathryn Stinson, Didier K Ekouevi, Nathan Shaffer

J Acquir Immune Defic Syndr· September 2015

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Elimination of mother-to-child transmission of HIV and syphilis: A dual approach in the African Region to improve quality of antenatal care and integrated disease control.
Morkor Newman Owiredu, Lori Newman, Theresa Nzomo, Ghislaine Conombo Kafando, Saliyou Sanni, Nathan Shaffer

Int J Gynaecol Obstet· June 2015

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First population-level effectiveness evaluation of a national programme to prevent HIV transmission from mother to child, South Africa.
Ameena E Goga, Thu-Ha Dinh, Debra J Jackson, Carl Lombard, Kevin P Delaney, Nathan Shaffer

J Epidemiol Community Health· March 2015

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Introducing INSPIRE: an implementation research collaboration between the Department of Foreign Affairs, Trade and Development Canada and the World Health Organization.
Pierre Blais, Gottfried Hirnschall, Elizabeth Mason, Nathan Shaffer, Zuzanna Lipa

J Acquir Immune Defic Syndr· November 2014

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Prioritizing the PMTCT implementation research agenda in 3 African countries: INtegrating and Scaling up PMTCT through Implementation REsearch (INSPIRE).
Nigel Rollins, Harriet Chanza, Frank Chimbwandira, Michael Eliya, Ishmael Nyasulu, Nathan Shaffer

J Acquir Immune Defic Syndr· November 2014

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Defining and analyzing retention-in-care among pregnant and breastfeeding HIV-infected women: unpacking the data to interpret and improve PMTCT outcomes.
Nigel C Rollins, Renaud Becquet, Joanna Orne-Gliemann, Sam Phiri, Chika Hayashi, Nathan Shaffer

J Acquir Immune Defic Syndr· November 2014

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Safety of efavirenz in the first trimester of pregnancy: an updated systematic review and meta-analysis.
Nathan Ford, Lynne Mofenson, Zara Shubber, Alexandra Calmy, Isabelle Andrieux-Meyer, Nathan Shaffer

AIDS· March 2014

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Community and service provider views to inform the 2013 WHO consolidated antiretroviral guidelines: key findings and lessons learnt.
Amy C Hsieh, Gitau Mburu, Adam B J Garner, Anja Teltschik, Mala Ram, Nathan Shaffer

AIDS· March 2014

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Adoption of national recommendations related to use of antiretroviral therapy before and shortly following the launch of the 2013 WHO consolidated guidelines.
Lisa J Nelson, Michael Beusenberg, Vincent Habiyambere, Nathan Shaffer, Marco A Vitoria

AIDS· March 2014

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Developing the 2013 WHO consolidated antiretroviral guidelines.
Philippa J Easterbrook, Cadi J Irvine, Marco Vitoria, Nathan Shaffer, Lulu M Muhe

AIDS· March 2014

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Health benefits, costs, and cost-effectiveness of earlier eligibility for adult antiretroviral therapy and expanded treatment coverage: a combined analysis of 12 mathematical models.
Jeffrey W Eaton, Nicolas A Menzies, John Stover, Valentina Cambiano, Leonid Chindelevitch, Nathan Shaffer

Lancet Glob Health· January 2014

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Health benefits, costs, and cost-effectiveness of earlier eligibility for adult antiretroviral therapy and expanded treatment coverage: a combined analysis of 12 mathematical models.
Jeffrey W Eaton, Nicolas A Menzies, John Stover, Valentina Cambiano, Leonid Chindelevitch, Nathan Shaffer

Lancet Glob Health· December 2013

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