
Keywords: NTD; neural tube defect; TH; thyroid hormones; RA; retinoic acid; T3; 3, 3, 5-triiodo-l-thyronine; T2; diiodo-l-thyronine; rT3; reverse T3; TR; thyroid receptor; RXRs; retinoid X receptors; RAR; retinoic acid receptor; HRE; hormone-response elements; ER;