( ( ( Humoral ( immune responses ) ) ( ( ( in ( healthy ( ( ( heterosexual and ) vasectonized ) men ) ) ) and ) ( in ( ( homosexual men ) ( with ( the ( acquired ( immunodeficiency syndrome ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Humoral) (NP (JJ immune) (NNS responses)) (PP (PP (IN in) (NP (JJ healthy) (ADJP (JJ heterosexual) (CC and) (JJ vasectonized)) (NNS men))) (CC and) (PP (IN in) (NP (NP (JJ homosexual) (NNS men)) (PP (IN with) (NP (DT the) (VBN acquired) (NN immunodeficiency) (NN syndrome))))))) (. .)))
Humoral immune responses in healthy heterosexual and vasectonized men and in homosexual men with the acquired immunodeficiency syndrome.
(ROOT (S (NP (DT The) (NN term)) (ADVP (RB immunodeficiency)) (VP (VBZ means) (NP (NP (DT a) (NN failure) (, ,) (NN insufficiency) (, ,) (CC or) (NN delay)) (PP (IN in) (NP (NP (DT the) (NN response)) (PP (IN of) (NP (NP (DT the) (JJ immune) (NN system)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD may) (VP (VB be) (VP (VBN acquired) (CC or) (VBN inherited)))))))))))) (. .)))