
Keywords: ASQ, Ages and Stages Questionnaire; BMI, Body Mass Index; DDE, dichlorodiphenyl dichloroethylene; DDT, dichlorodiphenyl trichloroethane; FT3, free tri-iodothyronine; FT4, free thyroxine; GAM, generalized additive model; HCB, hexachlorobenzene; IQ, Intelli