Abstract Background Concerns have been raised that military veterans are at greater risk of dementia due to increased rates depression, post-traumatic stress disorder (PTSD) and traumatic brain injury (TBI) found in this population. The prevalence English whether is different non-veterans, however, currently unknown. Aims To study the veteran population, we aimed calculate a group compare with ...

a randomized cross sectional epidemiologic study about the occupational health problems of hairdressers was conducted in tehran in 1988. the sample selected for survey consisted of 200 women and 398 men- study findings indicated that the working hours were often irregular and overtime. evaluation of working conditions showed that the female hairdressers were more exposed to noise than male. the...