Increasing number of patients who leave the ED without being seen.
D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D006801:Humans; D010342:Patient Acceptance of Health Care / Q000706:statistics & numerical data; D010352:Patient Dropouts / Q000706:statistics & numerical data*; D012307:Risk Factors; D013030:Spain; D014850:Waiting Lists