Type 2 Iodothyronine Deiodinase Transgene Expression in the Mouse Heart Causes Cardiac-Specific Thyrotoxicosis**This work was supported by grants from the NIH [DK-36256 (to P.R.L.); DK-49126 and DK-53036 (to F.E.W.) and Specialized Center of Research Grant HL-52320 (to J.S.I.)].