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- LLN, lower limit of normal
LLN, lower limit of normal
- Chronic obstructive pulmonary disease in the older adult: what defines abnormal lung function?David M Mannino, A Sonia Buist, William M VollmerThorax Mar 2007, 62 (3) 237-241; DOI: 10.1136/thx.2006.068379
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