(S (S (BASENP (DT The) (NN finding)) (VP (VBZ supports) (NP (NP (BASENP (DT the) (NNS researchers) (POS ')) (NN theory)) (SBAR (IN that) (S (NP (NP (BASENP (JJ reduced) (NN exposure)) (PP (TO to) (BASENP (JJ common) (NNS infections)))) (PP (IN in) (NP (BASENP (DT the) (JJ first) (NN year)) (PP (IN of) (BASENP (NN life)))))) (VP (VBZ increases) (NP (BASENP (DT the) (NN risk)) (PP (IN of) (S (VP (VBG developing) (NP (BASENP (JJ acute) (JJ lymphoblastic) (NN leukemia)) (PRN (LRB -LRB-) (BASENP (NN ALL)) (RRB -RRB-))))))))))))) (PERIOD .))