Background of asthma Prevalence in the world: 1.6 hundred million in China:1-3 in Shenyang: 1.24 %(1999) GINA: Global Initiative for Asthma(1994) WHO/HLBI Bronchial asthmatic diagnosis guideline (1997) Chinese medical academy
Introduction \Breast cancer is one of the best studied human tumors, but it remains poorly understood” “ As in all medical endeavors, the practitioner should, whenever possible, use the results of scientific studies to quide clinical decision\