Despite the majority of patients having a primary care physician, less than half of them actually contacted these providers (or another health care provider) before presenting to the PED for their nonurgent illness or injury. Of these, nearly two thirds were specifically instructed to come to the PED by the health care provider in the community.

This study identified risk factors associated with a higher prevalence of oGVHD DES in post-AHSCT patients with cGVHD.

Clusters of tetracene molecules with different numbers of attached (Ar)(N), (Ne)(N) and (H(2))(N) particles (N = 1-2000) are assembled inside superfluid He nanodroplets and studied via laser-induced fluorescence. The frequency shift of the fluorescence spectrum of the tetracene molecules is studied as a function of cluster size and pickup order of tetracene and cluster species. For (Ar)(N) and (Ne)(N) clusters, our results indicate that the tetracene molecules reside inside the clusters when tetracene is captured by the He nanodroplet before the cluster species; conversely, the tetracene molecules stay on the surface of the clusters when tetracene is captured after the cluster species. In the case of (H(2))(N) clusters, however, tetracene molecules reside inside the (H(2))(N) clusters irrespective of the pickup order. We conclude that (Ar)(N) and (Ne)(N) clusters are rigid at T = 0.38 K, while (H(2))(N) clusters of up to N = 2000 remain fluxional at the same temperature. The results may also indicate the occurrence of heterogeneous nucleation of the (H(2))(N) clusters, which is induced by the interaction with tetracene chromophore molecules.

The triply degenerate ν 4 bending mode of methane in superfluid helium nanodroplets was observed at 7.7 μm by high-resolution infrared depletion spectroscopy. Five rotational transitions were detected, with a minimum linewidth of only 65 MHz. The observed lines showed slightly asymmetric line shapes, especially in the case of the P (2) and R(1) rotational lines. Analysis of the line shape indicates that the superfluid environment has a finite response time of a few nanoseconds to equilibrate upon rotational excitation of CH 4 .

Purpose: This cross-sectional study assessed the attitudes of Canadian ophthalmology residents (PGY1-5) and pre-clerkship medical students (year 1 and 2) at the University of Toronto towards individuals experiencing homelessness. Methods: Residents and students were invited to complete the Health Professionals' Attitudes Towards the Homeless Inventory (HPATHI) tool to assess attitudes, interests and confidence in working with the homeless population on a 5-point Likert scale. Comparisons were made between residents and pre-clerkship learners and between junior and senior residents using the Fisher exact test and Mann-Whitney U test. Results: Responses were received from 114 of 220 ophthalmology residents (52%) and 315 of 534 (59%) pre-clerkship medical students. Ophthalmology residents had significantly more negative overall attitudes (pre-clerk median = 4.4, resident median = 4.1, both still indicating positive attitudes) and interests (pre-clerk median = 4.0, resident median = 3.3, residents with more neutral interests) towards working with the homeless population compared to pre-clerkship medical students. Using both statistical methods, beliefs were significantly more negative in 7 of 9 'Attitude' items, 5 of 5 'Interest' items and 1 of 4 'Confidence' items. Ophthalmology residents were only more positive in 1 of 4 of the 'Confidence' items. Attitudes were similar across PGY1-5 training years, except PGY4 and PGY5 residents were more negative than PGY1-3 residents on 1 of 5 'Interest' items. Conclusions: Ophthalmology residents have an at least neutral perception of individuals experiencing homelessness, while medical students have a more positive opinion. Studies exploring optimal ways to advocate for this population are needed for Canada's eye-care trainees.