Figure 1: The top 15 causes of mortality globally in 2004 [5]. The causes are: 1: Ischemic heart disease; 2: Cerebrovascular disease; 3: Lower respiratory infections; 4: Chronic obstructive pulmonary disease; 5: Diarrheal diseases; 6: HIV/AIDS; 7: Tuberculosis; 8: Trachea, bronchus, lung cancers; 9: Road traffic accidents; 10: Prematurity and low birth weight; 11: Neonatal infections; 12: Diabetes mellitus; 13: Hypertensive heart disease; 14: Malaria; 15: Birth asphyxia and birth trauma.