9Valletta EA, Diacentini GL, Del GG, et al. FEF25～75 as a marker of airway obstruction in asthmatic children during reduced mite exposure at high latitude[J]. J asthma, 1997,34:127.
10Cautien H. Mechanical properties of the lungs during ac ctimatization to altitude[J]. J Apple physiol Respirat Environ Exercise physiol, 1982,52: 1407.
