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The conditions and duration of compensation for short-term leaves for pregnancy , childbirth , or family emergencies involving spouse , parents , or children are analogous to those for leaves granted for temporary disability or personal emergencies . Fleetwood had written to Secretary of State Thurloe in 1655 declaring that freedom for tender consciences and limitation of the powers and duration of Parliament were the two essentials of any settlement . Ultimately , you will use information on contamination sources for perspective on the types and durations of possible exposures . When lung tissue is available for histopathologic examination , confirmation of diagnosis requires both fibrosis and accumulation of asbestos bodies or fibers.Determining the cause depends on assessment of the levels and duration of exposure and on knowledge of occupational epidemiologic studies.Assessment of impairment , which is a key ingredient in determining disability , is based mainly on pulmonary function studies.No evidence exists to confirm that small airway disease , which is detected by flow volume curves , progresses to asbestosis.Pleural plaques may coexist with asbestosis , but pleural plaques alone are usually not associated with impaired pulmonary function .