Figure 2From: The association of down-regulated toll-like receptor 4 expression with airflow limitation and emphysema in smokersAirflow limitation and emphysema severity according to TLR4 expression. (A) FEV1/FVC increased and (B) emphysema score decreased as TLR4 expression increased. TLR4, Toll-like receptor 4; FEV1, Forced expiratory volume in one second; FVC, Forced vital capacity.Back to article page