Figure 3From: Systemic inflammation in COPD in relation to smoking statusInfiammazione sistemica nella BPCO in rapporto alla condizione tabagicaSerum sTNFR-1 concentration in COPD smokers, ex-smokers and never-smokers. Definition of abbreviation: sTNFR-1, soluble tumor necrosis factor α receptor 1. Data are presented as median (25th-75th percentile).Back to article page