BACKGROUND Chronic tracheal obstruction has been associated with learning deficits; hence, early surgical intervention has been suggested. AIM To evaluate the relationship between learning performance and vascular ring caused by an isolated aberrant right subclavian artery. METHODS Participants included 1,685 undergraduate students (ie, students of medical informatics and medical/public hea...

Abstract The expediency of replacing the corrugated ring a vascular stent with constant corrugation pitch by variable is being investigated. To describe change in corrugation, special function introduced. equilibrium and deformation equations were analyzed using asymptotic homogenization method. dependence radial stiffness on constructive parameters obtained. effectiveness design under consider...

background and objective: tubal sterilization is the most popular method of permanent female contraception, yet there is considerable debate concerning the influence of this procedure on the women’s health and menstrual pattern.   methods: we randomized 1358 women to one of the five methods of tubal sterilization; unipolar electrocauterization, bipolar electrocauterization, minilaparatomy, pome...