Evaluation of menstrual irregularities following COVID-19 infection or vaccination: The impact of COVID anxiety and associated risk factors.

There has been significant interest in the changes in menstrual cycles following coronavirus disease 2019 (COVID-19) infection or vaccination. This study aimed to investigate the evidence for such changes and their potential risk factors. We used a descriptive study design and gathered data by sharing an online survey questionnaire on social media platforms.

The association of vertebrobasilar calcification with etiological subtypes, stroke recurrence and outcome in acute brainstem ischemic stroke.

Arterial calcification (AC), a frequent finding on imaging studies, has been reported as a risk factor for ischemic stroke. However few studies have explored the association of AC with etiological subtypes and prognostic implications. The purpose of this study was to investigate the association of AC with demograhics, risk factors and etiological subtypes and to determine whether it predicts stroke recurrence and functional outcome in patients with acute brainstem ischemic stroke.

Hyperperfusion in carotid stenting patients.

Purpose: This study aimed to define hyperperfusion in carotid stenting patients without excluding patients with stenosis on the contralateral side.

Materials And Methods: A total of 32 patients were enrolled. Prestent computed tomography perfusions were performed within 1 week before stenting, poststent perfusions 3 days after stenting.

Assembly of magnetic nanoparticles into higher structures on patterned magnetic beads under the influence of magnetic field.

The self-assembly of nanoparticles into higher organizations in a controlled manner has critical importance for the utility of the unique properties of nanoparticles. The behavior of magnetic Fe(3)O(4) nanoparticles (MNPs) with an average size of 6 nm under an enhanced magnetic force is reported. Upon evaporation of the solvent where the MNPs are suspended, formation of unique micrometer-sized structures is achieved only when there is a patterned surface constructed from sub-micrometer size magnetic beads in between the applied magnetic field and the MNPs.