N-Alkylpyridinium sulfonates for retention time indexing in reversed-phase-liquid chromatography-mass spectrometry-based metabolomics.

Chromatographic retention time information is valuable, orthogonal information to MS and MS/MS data that can be used in metabolite identification. However, while comparison of MS data between different instruments is possible to a certain degree, retention times (RTs) can vary extensively, even when nominally the same phase system is used. Different factors such as column dead volumes, system extra column volume, and gradient dwell volume can influence absolute retention times.

Preventing Traumatic Causes of Maternal Death.

Despite medical advances, maternal deaths in the U.S. are more common than in nearly all other developed nations.

A Mobile Clinic Care Coordination Program: Enhancing Patient Care with Innovative Roles for Undergraduate Students.

The University of Florida Mobile Outreach Clinic's Care Coordination Program uses trained undergraduate volunteers to provide vital services; these include patient intake, recording vital signs, scribing first drafts of clinic notes, and making follow-up phone calls. The program and its benefits are replicable as demonstrated by our systematic implementation plan.

Continuous Rural-Urban Coding for Cancer Disparity Studies: Is It Appropriate for Statistical Analysis?

: The dichotomization or categorization of rural-urban codes, as nominal variables, is a prevailing paradigm in cancer disparity studies. The paradigm represents continuous rural-urban transition as discrete groups, which results in a loss of ordering information and landscape continuum, and thus may contribute to mixed findings in the literature. Few studies have examined the validity of using rural-urban codes as continuous variables in the same analysis.