Student Perceptions of iPad Applications-Assisted Instruction in Health Professions Education.

The purpose of this study was to examine student's perceptions of the iPad applications-assisted instruction as part of their learning. In this study, multiple features and applications were evaluated as an instructional tool. Fifteen participants responded to the survey indicating their perceptions of the iPad and applications used as part of their course delivery.

Influence of delayed isotopic equilibration in urine on the accuracy of the (2)H(2)(18)O method in the elderly.

Isotopic determination of total energy expenditure (TEE) by the doubly labeled water (DLW) method may be affected by urine retention in the elderly. The isotopic enrichments in urine and plasma sampled simultaneously 4 h post-DLW dose were compared in a subset of 281 subjects [139 women, 142 men, 75 +/- 3 (SD) yr] of the 3,075 participants in the Health, Aging, and Body Composition study. Based on analytic precisions, a +/- 2% urine-plasma difference was set as the cut-off value.