( ( ( ( ( Vitamin B12 ) ( affects ( ( the maturation ) ( of ( ( all ( epithelial cells ) ) ( -LRB- ( ( cells ( that ( form ( ( the ( outer surface ) ) ( of ( ( ( the body ) and ) ( line ( inner passageways ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ) ) and ) ( ( a deficiency ) ( may ( cause ( a ( false ( positive ( pap smear ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Vitamin) (NNP B12)) (VP (VBZ affects) (NP (NP (DT the) (NN maturation)) (PP (IN of) (NP (NP (DT all) (JJ epithelial) (NNS cells)) (PRN (-LRB- -LRB-) (NP (NP (NNS cells)) (SBAR (WHNP (WDT that)) (S (VP (VBP form) (NP (NP (DT the) (JJ outer) (NN surface)) (PP (IN of) (NP (NP (DT the) (NN body)) (CC and) (NP (NN line) (JJ inner) (NNS passageways))))))))) (-RRB- -RRB-))))))) (CC and) (S (NP (DT a) (NN deficiency)) (VP (MD may) (VP (VB cause) (NP (DT a) (JJ false) (JJ positive) (NN pap) (NN smear))))) (. .)))
Vitamin B12 affects the maturation of all epithelial cells (cells that form the outer surface of the body and line inner passageways) and a deficiency may cause a false positive pap smear .
(ROOT (S (NP (NNP Epithelial) (. ?) (NNP tissue)) (VP (VBZ consists) (PP (IN of) (NP (NP (NNS cells)) (SBAR (WHNP (WHNP (WDT that) (NN cover)) (NP (JJ inner) (CC and) (JJ outer) (NN body))) (S (VP (VBZ surfaces))))))) (. .)))