Given the national discussion on the size, scope, and potential influence of commercial support for continuing medical educa-tion (CME) activities, Tabas et al surveyed attendees at a series of live CME activities about CME funding, bias, and costs. Of the 770 respondents, the majority believed that commercial support introduces bias (88%), with greater amounts of support introducing greater risk of bias. Only 15%, however, supported elimination of commercial support from CME activities, and less than half (42%) were willing to pay increased registration fees to decrease or eliminate commercial support. Participants who perceived bias from commercial support were more likely (2- to 3-fold) to favor increased registration fees to decrease such support. Participants greatly underestimated the costs of ancillary activities such as food as well as the amount of commercial funding.