Expert Panel Design

The panel is deliberately multidisciplinary to improve real-world applicability and ensure the framework reflects regulatory, clinical, economic, technical, research, and patient-access concerns. The study aims to recruit approximately 25 experts, with a minimum of three participants from each of six stakeholder categories. Participants are compensated US$100 in instalments for their time. The planned panel size is 65 stakeholders, which exceeds the literature minimum for transdisciplinary research. Snowball sampling will supplement purposive recruitment by asking invitees to suggest other eligible participants. Potential participants are identified through research networks, ethics committees, publications, government policy roles, personal contacts, and referrals. Recruitment will prioritise Europe while seeking diversity across European regions, health system types, and levels of economic development. Eligibility requires documented involvement in at least one relevant area including PDTx regulation, reimbursement decision-making, clinical deployment, peer-reviewed publications, or professional body leadership.