Publications by authors named "David Hafner"

The impact of individual scientists is commonly quantified using citation-based measures. The most common such measure is the h-index. A scientist's h-index affects hiring, promotion, and funding decisions, and thus shapes the progress of science.

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The success of monocular depth estimation relies on large and diverse training sets. Due to the challenges associated with acquiring dense ground-truth depth across different environments at scale, a number of datasets with distinct characteristics and biases have emerged. We develop tools that enable mixing multiple datasets during training, even if their annotations are incompatible.

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Persistent primitive hypoglossal artery (PPHA) is a rare internal carotid-vertebrobasilar anatomic variant. Awareness of this anomaly and its propensity for atherosclerotic disease is important to avoid misinterpretation of diagnostic studies and to allow appropriate interventional planning. As the predominant vascular supply to the anterior and posterior cerebral circulation, its luminal compromise can lead to devastating ischemic complications.

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Background And Aims: The treatment options for eosinophilic esophagitis (EoE) patients include drugs (proton pump inhibitors [PPIs], swallowed topical corticosteroids [STCs]), elimination diets, and dilation. Given the lack of data, we aimed to assess adult EoE patients' satisfaction with different EoE-specific treatment modalities.

Patients And Methods: We evaluated therapy satisfaction recalled over a 12-month period using the validated Treatment Satisfaction Questionnaire for Medication that assesses effectiveness, side effects, convenience, and overall satisfaction.

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We synthesize observations from 1979 to 2016 of a contact zone involving two subspecies of pocket gophers ( and ) and their respective chewing lice ( and ) along the Río Grande Valley in New Mexico, U.S.A.

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Understanding the genetic consequences of changes in species distributions has wide-ranging implications for predicting future outcomes of climate change, for protecting threatened or endangered populations and for understanding the history that has led to current genetic patterns within species. Herein, we examine the genetic consequences of range expansion over a 25-year period in a parasite (Geomydoecus aurei) that is in the process of expanding its geographic range via invasion of a novel host. By sampling the genetics of 1,935 G.

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Background & Aims: Eosinophilic esophagitis (EoE) is assessed endoscopically (endoscopic activity), based on grades of edema, rings, exudates, furrows, and strictures (EREFS). We examined variations in endoscopic assessments of severity, developed and validated 3 EREFS-based scoring systems, and assessed responsiveness of these systems using data from a randomized placebo-controlled trial of patients with EoE.

Methods: For the development set, 5 gastroenterologists reviewed EREFS findings from 266 adults with EoE and provided endoscopist global assessment scores (EndoGA, scale of 0 to 10); variation (ΔEndoGA) was assessed using linear regression.

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Background: Well informed patients who are in cohesive partnership with physicians and who have realistic expectations towards therapy are more likely to be adherent, which results in better disease control.

Aim: To assess which therapy goals adults with eosinophilic oesophagitis consider relevant.

Methods: Following refinement during three focus groups, a study brochure and questionnaire were sent to 148 patients.

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In the setting of acute myocardial infarction, decreases in early/late mortality, reocclusion after thrombolysis, and restenosis rate after percutaneous intervention are lower in smokers - this phenomenon has been designated as the 'smoker's paradox'. These benefits of smoking, however, are abrogated by stent placement. We hypothesized that fibrinolytic vulnerability would change in response to smoking, and that inhaled carbon monoxide may play a role.

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Virtually every disease state associated with chronic or acute thrombosis has had smoking identified as a risk factor. Further, smoking enhances clot strength as assessed by thrombelastography. Critically, carbon monoxide, a product of cigarette smoking, has been demonstrated to enhance plasmatic coagulation in vitro via modulation of a heme associated with fibrinogen.

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Carbon monoxide (CO) has been demonstrated to enhance coagulation and attenuate fibrinolysis in vitro and in vivo. Hemostasis is affected by CO interactions with key heme-modulated molecules. We wished to determine whether freezing would affect CO-mediated changes in coagulation/fibrinolysis in plasma in anticipation of collecting samples both within our institution and from collaborating centers.

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Many species of pocket gophers and their ectoparasitic chewing lice have broadly congruent phylogenies, indicating a history of frequent codivergence. For a variety of reasons, phylogenies of codiverging hosts and parasites are expected to be less congruent for more recently diverged taxa. This study is the first of its scale in the pocket gopher and chewing louse system, with its focus entirely on comparisons among populations within a single species of host and 3 chewing louse species in the Geomydoecus bulleri species complex.

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The genetic consequences of climate-driven range fluctuation during the Pleistocene have been well studied for temperate species, but cold-adapted (e.g., alpine, arctic) species that may have responded uniquely to past climatic events have received less attention.

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Mitochondrial-DNA sequence data were analyzed from individuals sampled from 38 localities across the complete geographic range of the closely related pocket gopher genera Pappogeomys and Cratogeomys. Results of phylogenetic analysis of 1133 base pairs from the cytochrome b gene are consistent with past hypotheses of relationships among members of the castanops species group within the genus Cratogeomys. However, phylogeographic variation within the gymnurus species group of the genus Cratogeomys differs significantly from relationships reflected by current taxonomy.

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Historical flood records for the Rio Grande Valley of New Mexico suggest that a pocket gopher (Thomomys bottae) hybrid zone previously thought to be 10,000 years old may actually be closer to 50 years old. Measured zone width (defined genetically) is consistent with the hypothesis of recent contact, if we assume a reasonable dispersal distance of approximately 400 m/year for pocket gophers. A five-year study of movement of the contact zone between the two species of chewing lice that parasitize these pocket gophers also is consistent with the hypothesis of recent origin of the zone.

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Genetic variation among populations of chewing lice (Geomydoecus actuosi) was examined in relation to chromosomal and electrophoretic variation among populations of their hosts (Thomomys bottae) at a contact zone. Louse demes were characterized by low levels of genetic heterozygosity (H̄ = 0.039) that may result from founder effects during primary infestation of hosts, compounded by seasonal reductions in louse population size.

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