Based on the outcomes of the initial study (NCT05348603), this optimization study will employ the most effective interventions (letters and messages) and distribute these communications to underrepresented minorities to further promote interest in research. Optimized language will be distributed in English, Spanish, Portuguese, Chinese, Arabic, or Haitian Creole, based on preferred language identified in the patient profile in an electronic medical records system.

The primary objective of the optimization study is to examine the effectiveness on increasing interest in research of an optimized letter versus a generic letter; an optimized message versus a generic message; and an optimized letter and an optimized message versus a generic letter and a generic message.

The secondary objective of the optimization study is to examine the effectiveness on increasing participation in research of an optimized letter versus a generic letter, an optimized message versus a generic message, an optimized letter and an optimized message versus a generic letter and a generic message.

Inclusion Criteria:

• Has an account with the online patient portal
• Has logged into the online patient portal at least once in the past year
• Has not set up a research profile

Exclusion Criteria:

• Currently enrolled in a clinical trial
• Opted out of research
• On active cancer treatment
• Active member of the study team