sentence: To our knowledge , no study has compared ER transactivation induced by perfluorinated sulfonate mixtures with ER transactivation induced by perfluorinated carboxylate mixtures.In the present study ( Model 1 ) , we estimated a mean difference in BW of − 48g ( 95 % CI : − 90 , − 6 ) per IQR increase in XER , − 24g ( 95 % CI : − 45 , − 2 ) for W2-EEQ , and − 2g ( 95 % CI : − 48 , 43 ) for XERcomp ( Table 3 ) .