notwithstanding a century of prohibition, marijuana is the most widely used illicit substance in canada. due to the growing public acceptance of recreational marijuana use and ineffectiveness of the existing control system in canada, the issue surrounding legalizing this illicit drug has received considerable public and political attentions in recent years. consequently, the newly elected liber...

background: drivers of heavy motor vehicles are occupationally exposed to intense whole body vibration (wbv) for several hours per day over their working lifetime. therefore, they are at risk of wbv-induced occupational disorders. this study aimed to investigate health effects of long-term exposure to whole body vibration among a group of heavy vehicle drivers in fars province, southwestern ira...

introduction: the effect of dust on human health has been confirmed according to the geographical location of iran and the existence of this phenomenon in most provinces, particularly the western and southern provinces. this review discusses the role of proper nutrition in reducing the harmful effects of dust on human health. methods: in this systematic review, the published articles were found...

This paper examines the effects of laws mandating that health insurance cover specific conditions, procedures, providers, and beneficiaries. Unlike previous work, this paper considers the market for employer-based health insurance rather than the much smaller individual market, and uses a panel data approach to account for unobserved heterogeneity among states. Using a fixed effects model, I fi...

background: petrochemical industry emits air pollutants in abundance, which may harm human health, especially the population living near the industry. children are reported to be the population group of main concern since this susceptible population spends the majority of their time outdoors and their active lifestyle can increase their breathing rate, which then leads to a greater inhalation d...

Received analyses based on stochastic frontier modeling with panel data have relied primarily on results from traditional linear fixed and random effects models. This paper examines extensions of these models that circumvent two important shortcomings of the existing fixed and random effects approaches. The conventional panel data stochastic frontier estimators both assume that technical or cos...

background: today with population growing, surface water is one of the most important water resources used for domestic and industrial consumptions. in order to purify the surface water, coagulants materials are used. the purpose of this study was to assess the possibility of using poly aluminum chloride (pacl) in water refinery number 1 in city of orumieh and investigating its health effects. ...

Retail Clinics are a recent and growing health care delivery organization offering low cost, convenient access to the simple treatment of low acuity conditions. We examine the impact of retail clinics on cost and utilization using a comprehensive health insurance administrative database representing millions of American insured consumers. We address the potential endogeneity of retail clinic ut...