International aspects of cardiac surgery.
Pezzella
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D019992:Databases as Topic; D003695:Delivery of Health Care; D019049:Developed Countries; D003906:Developing Countries; D006801:Humans; D007391:International Cooperation; D016730:Program Development; D012955:Societies, Medical; D013903:Thoracic Surgery / Q000458:organization & administration*; D014480:United Nations; D014481:United States; D014944:World Health Organization