Probands receive access to the Kindred web-based portal on study consisting of the following sections: Share and Invite, Meaning of Results, Implications of Results, Communication with Family, Dissemination Plan, Looking Ahead, Glossary, FAQ, Resources List, and Public-Facing Website Information. Probands may optionally share information about their test results and invite >= 4 relatives to join the study via the Share and Invite section in the Kindred portal. Probands also receive two check-in calls at 2- and 4- weeks post-baseline.

Invited relatives receive access to the Kindred web-based portal on study consisting of the following sections: Meaning of Results, Implications of Results, Communication with Family, Getting Testing, Looking Ahead, Glossary, FAQ, Resources List, and Public-Facing Website Information.

Ancillary studies

Will carefully monitor recruitment (refusals and enrollees, 20% of invited). As this is a single-arm pilot study, no formal hypothesis testing is planned. Qualitative data from focus groups will be conducted using directed content analysis in order to identity key findings and themes to inform intervention content and structure for a future clinical trial.

Will carefully monitor retention (75% of enrolled). As this is a single-arm pilot study, no formal hypothesis testing is planned. Qualitative data from focus groups will be conducted using directed content analysis in order to identity key findings and themes to inform intervention content and structure for a future clinical trial.

Will carefully monitor reasons for enrollment. As this is a single-arm pilot study, no formal hypothesis testing is planned. Qualitative data from focus groups will be conducted using directed content analysis in order to identity key findings and themes to inform intervention content and structure for a future clinical trial.

Will carefully monitor reasons for ineligibility. As this is a single-arm pilot study, no formal hypothesis testing is planned. Qualitative data from focus groups will be conducted using directed content analysis in order to identity key findings and themes to inform intervention content and structure for a future clinical trial.

Will carefully monitor reasons for dropout and withdrawal. As this is a single-arm pilot study, no formal hypothesis testing is planned. Qualitative data from focus groups will be conducted using directed content analysis in order to identity key findings and themes to inform intervention content and structure for a future clinical trial.

Will be calculated as the percentage of at-risk relatives completing cascade testing as follows: percent of enrolled relatives completing testing = number of at-risk enrolled relatives completing testing/total number of enrolled relatives at risk. Will collect data from enrolled relatives at follow-up, to determine the number of at-risk enrolled relatives who completed testing (numerator). Will collect data from proband clinic records, and proband and relative surveys, to determine the number of enrolled relatives at risk, that is, those for whom further testing is recommended (denominator). Will also examine this outcome by relative degree status (i.e., percent of first-degree enrolled relatives competing testing, etc.). Will be tabulated and summarized with descriptive statistics.