Antunes, F., Sousa, N. and Teixeira, P. 2025. Development and Validation of the “Physical Functional Impact Index on Chronic Pain” (PFIICP): A Formative Model Approach. Acta Médica Portuguesa. 38, 10 (Aug. 2025), 629–634. DOI:https://doi.org/10.20344/amp.23516.