Abstract The field of (U-Th)/He geochronology and thermochronology has grown enormously over the past ∼25 years. tool is applicable across much geologic time, new chronometers are under continuous development, method used in a diverse array studies. Consequently, technique rapidly expanding user base, labs being established worldwide. This presents both opportunities challenges. Currently there...

background :hypertension is an important public-health challenge worldwide. the prevalence of hypertension greatly varies across countries. the aim of this study was to estimate the prevalence of self-reported hypertension and to determine related factors in a large random sample of tehran population in 2011.   methods : in this cross sectional study, 69173 individuals aged 25–64 years were sel...

background and objectives: not reporting medication errors by the clinical staff prevent identification of type and frequency of these errors, and thereby developing effective strategies to alleviate the problem. most investigation of barriers to medication error reporting comes from public hospitals. this study aimed to explore the issue from a nurse’s perspective in private hospital. methods:...