Calderón, C., E. Ferreira, M. Fernández-Andújar, R. Hernández, V. Pacheco-Barcia, M. Palacin-Lois, D. Gómez, O. Higuera, R. Martínez-Cabañes, P. J. Ferrando, U. Lorenzo-Seva, and A. Carmona-Bayonas. “Psychometric Properties of the PDRQ-9 in Cancer Patients: Patient-Doctor Relationship Questionnaire”. Psicothema, vol. 33, no. Número 2, May 2021, pp. 304-11, https://reunido.uniovi.es/index.php/PST/article/view/17100.