The authors sought to determine how rapidly a focus of CO toxic to humans will be reached in the noninfused chamber and whether diffusion would then continue. The researchers found that carbon monoxide diffused across single-layer gypsum wallboard of 2 thicknesses, double-layer wallboard, and painted double-layer wallboard. ‘Gypsum's permeability to CO is because of its porosity. Exempting residences without internal CO resources from the legislation mandating CO alarms may put people in multifamily dwellings at risk for unintentional CO poisoning.’..Additional cases have already been cited in Idaho, Minnesota, New Jersey, NEW YORK, Ohio, Texas, and Illinois now Initial lawsuit filed against Mass. Pharmacy amid mounting criticism Steroid injections linked with meningitis outbreak could cause joint infection New allegations in deadly meningitis outbreak.. Problem of Journal of American University of Radiology focuses on health-related services April Online Mon To be published, April 1, the April problem of the Journal of the American University of Radiology will focus on a number of issues relating to clinical practice, practice management, health services and policy, and radiology teaching and education.