Asthma, case study, case studies, allergens, home visiting models, ROI, Multnomah County Environmental Health Department, Portland, Oregon, OR, Baltimore City Bureau of Healthy Homes, Baltimore, Maryland, MD, Community Asthma Prevention Program of Philadelphia, Pennsylvania, PA, Neighborhood Health Plan, Boston, Massachusetts, MA, Seattle & King County, Seattle & King County Public Health Department, Seattle, Washington, WA, Asthma Network of West Michigan, MI, Michigan Department of Community Health, Lansing, 2014 | Case Studies: The Benefits of Home Visits for Children with Asthma