Predicated on data collected by the National Institute of Occupational Safety and Health, Lacerda compared the hearing of employees subjected to noise levels less than 90 decibels for 8 hours to some other group of workers exposed to noise levels above 90 decibels. In both combined groups, a sample of workers was exposed to carbon monoxide. The results revealed that the workers who were exposed to carbon monoxide also to noise levels above 90 decibels displayed considerably poorer hearing thresholds at high frequencies .Effective forces are pressing independent doctors to merge with major medical systems. Some health care business experts say we’re able to see a brand-new wave of consolidation within the next several years, as costs rise and federal government and private health plans cut payments . Related StoriesSignostics gets FDA 510k clearance for handheld bladder scannerWHO committed to helping Nepal deliver healthcare to its residents, says WHO South-East Asia Regional DirectorNHS ‘hourglass’ structure holds back advancement of support workforceRelated, previously KHN tale: Hospitals Lure Doctors FROM Private Practice . Minneapolis Superstar Tribune: Firm Doc Makes A Comeback At Anoka County and workplaces across Minnesota and beyond, the business doctor is producing a comeback.