Introduction: Trust is a major challenge for the online market and this is especially the case for e-consultation platforms. Research that promotes online physician trust is highly desirable. In this study, we focus on whether joining a team led by a well-known physician will increase physician trust and what team characteristics will affect this trust. Materials and Methods: Brand extension theory is applied to the healthcare context to explain the impact of joining a team on physician trust. Specifically, both team strength and team similarity are hypothesized to have the main effects. In addition, team size is hypothesized to have a moderating effect. A 2 × 2 × 2 experiment was conducted to test the proposed research model. Results: The results indicated that joining a team would significantly increase physician trust (p < 0.001). Both team strength (p < 0.001) and team similarity (p < 0.001) had positive impacts on physician trust. In addition, a larger team size resulted in a reduced positive effect of team strength on physician trust (p < 0.001). Conclusions: Joining a physician team is an effective and low-cost method to address the initial trust problem of unknown online physicians.
Keywords: brand extension theory; e-consultation; e-health; initial trust problem; physician trust; team similarity; team size; team strength.