Here is a 1-paragraph summary of the text: To improve participant engagement in REDCap healthcare research with Twilio SMS and Voice, users need to follow a step-by-step process that includes setting up their Twilio account, enabling the Twilio module in REDCap, designing engagement settings, sending survey invitations via SMS or voice calls, monitoring delivery of messages and calls, and considering important campaign requirements such as HIPAA compliance and number selection options. Users must also test with actual phones to ensure everything works as intended and consider factors like throughput needs, rate limiting, pricing, and payment options. With Twilio's Programmable SMS and Voice services, users can increase enrollment rates in their research projects, making it easier to engage participants and collect high-quality data.