Cardiac and Vascular Sonographers-Linked Together.
D001808:Blood Vessels / Q000000981:diagnostic imaging*; D004452:Echocardiography; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D009784:Occupational Diseases; D016273:Occupational Exposure / Q000592:standards* / Q000706:statistics & numerical data; D000069079:Radiation Exposure / Q000706:statistics & numerical data*; D018570:Risk Assessment