( ( ( ( ( Regulation ( of ( cytokine production ) ) ) ( by growth ) ) ( of ( lung ( structural cells ) ) ) ) ( including ( ( ( ( ( epithelial cells ) , ) fibroblasts ) and ) ( smooth ( muscle cells ) ) ) ) ) . )
(ROOT (NP (NP (NN Regulation)) (PP (IN of) (NP (JJ cytokine) (NN production))) (PP (IN by) (NP (NN growth))) (PP (IN of) (NP (NN lung) (JJ structural) (NNS cells))) (PP (VBG including) (NP (NP (JJ epithelial) (NNS cells)) (, ,) (NP (NNS fibroblasts)) (CC and) (NP (JJ smooth) (NN muscle) (NNS cells)))) (. .)))
Regulation of cytokine production by growth of lung structural cells including epithelial cells, fibroblasts and smooth muscle cells.
(ROOT (S (NP (JJ Smooth) (NN muscle)) (VP (VBZ regulates) (NP (NP (NN air) (NN flow)) (PP (IN in) (NP (NNS lungs))))) (. .)))
Smooth muscle regulates air flow in lungs.