7[3]Zengyi and Vaupel, J.W. (1989) . Impact of Urbanization and Delayed Childbearing on Population Growth and Aging in China, Population and Development Review 15: 425 - 445.
8Mose D K,Kimble L P,Alberts M J,et al.Reducing delay in seeking treatment by patients with acute coronary syndrome and stroke[J].J Cardiovas Nurs,2006,22(4):326-343.
9Ottesen M M,Dixen U,Torp-Pedersen C,et al.Prehospital delay in acute coronary syndrome-an analysis of the components of delay[J].Int J Cardiol,2004,96(1):97-103.
10Johansson I,Stromberg A,Swahn E.Ambulance use in patients with acute myocardial infarction[J].J Cardiovas Nurs,2004,19(1):5-12.
