Future manpower needs in cardiology.
D000328:Adult; D000368:Aged; D002309:Cardiology / Q000193:education; D004503:Education, Medical, Graduate; D005544:Forecasting; D006801:Humans; D008505:Medical Staff, Hospital; D008875:Middle Aged; D011156:Population Density; D011446:Prospective Studies; D013038:Specialization; D014481:United States; D000078329:Workforce