Prevalence of selected chronic digestive conditions, United States, 1975 : statistics on prevalence of chronic digestive conditions by measures of impact of the conditions and selected demographic characteristics. Based on data collected in the Health In
Pubbl/distr/stampa
Hyattsville, Md, : U.S. Department of Health, Education, and Welfare, Public Health Service, Office of Health Research, Statistics, and Technology National Center for Health Statistics