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  Indian J Med Microbiol
 

Figure 2: The two ways to record spirogram: volume recorded as a function of time (a) and fl ow-volume curve (b) [7]. FEF, maximal forced expiratory fl ow; FEV, forced expiratory volume

Figure 2: The two ways to record spirogram: volume recorded as a function of time (a) and fl ow-volume curve (b) [7]. FEF, maximal forced expiratory fl ow; FEV, forced expiratory volume