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- forced expiratory volume at the first second
: Forced expiratory volume in the first 1 seconds (Thể tích thở ra - Forced expiratory volume at the first second
: Forced expiratory volume in the first 1 seconds (Thể tích thở ra - Forced Expiratory Volume in the first second
: Forced expiratory volume in the first 1 seconds (Thể tích thở ra - Forced Expiratory Volume in the first second
: Forced expiratory volume in the first 1 seconds (Thể tích thở ra - Forced expiratory volume in the first second
: Forced expiratory volume in the first 1 seconds (Thể tích thở ra