Error in Table. In the Original Investigation by Morgan DeWitt et al titled “Medicare Coverage of Tumor Necrosis Factor α Inhibitors as an Influence on Physicians' Prescribing Behavior,” published in the January 9 issue of the ARCHIVES (2006;166:57-63), some errors occurred in Table 1 on page 59. Under the column heading “Private Insurance,” for infliximab, the correct value for n is 381. Under the column heading “Public Insurance,” for etanercept, the correct value for n is 204. For infliximab, the correct value for n is 578.