( ( Because ( ( the study ) ( ( did not ) ( ( include patients ) ( with ( severe asthma ) ) ) ) ) ) ( , ( ( ( ( decreased growth ) and ) ( ( physical activity ) ( in childhood ) ) ) ( ( ( ( would ( most likely ) ) not ) ( be ( ( a ( contributing factor ) ) ( to ( ( ( patients ' ) decrease ) ( in ( bone-mineral density ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (DT the) (NN study)) (VP (VBD did) (RB not) (VP (VB include) (NP (NNS patients)) (PP (IN with) (NP (JJ severe) (NN asthma))))))) (, ,) (NP (NP (VBN decreased) (NN growth)) (CC and) (NP (NP (JJ physical) (NN activity)) (PP (IN in) (NP (NN childhood))))) (VP (MD would) (ADVP (RBS most) (RB likely)) (RB not) (VP (VB be) (NP (NP (DT a) (VBG contributing) (NN factor)) (PP (TO to) (NP (NP (NP (NNS patients) (POS ')) (NN decrease)) (PP (IN in) (NP (JJ bone-mineral) (NN density)))))))) (. .)))
Because the study did not include patients with severe asthma, decreased growth and physical activity in childhood would most likely not be a contributing factor to patients' decrease in bone-mineral density.
(ROOT (S (NP (NP (NN Smoking) (NN tobaccowould)) (ADJP (RBS most) (JJ likely))) (VP (VBP have) (NP (NP (DT a) (JJ negative) (NN impact)) (PP (IN on) (NP (NP (DT the) (NN ability)) (PP (IN of) (NP (DT an) (ADJP (JJ individual) (S (VP (TO to) (VP (VB succeed) (PP (IN at) (NP (JJ physical) (NNS activities))) (SBAR (IN because) (S (NP (PRP it)) (NP (PRP it)))))))) (NNP decreases) (NN stamina) (CC and) (JJ cardiovascular) (NN efficiency))))))) (. .)))
Smoking tobaccowould  most likely have a negative impact on the ability of an individual to succeed at physical activities because it it decreases stamina and cardiovascular efficiency.