Martinez-Martin, P., Schapira, A., Stocchi, F., Sethi, K., Odin, P., MacPhee, G., … Chaudhuri, K. (2007). Prevalence of nonmotor symptoms in Parkinson’s disease in an international setting; study using nonmotor symptoms questionnaire in 545 patients. Movement Disorders : Official Journal of the Movement Disorder Society, 22(11), 1623-9. https://doi.org/10.1002/mds.21586 (Original work published 2007)

Drakatos, P., Marples, L., Muza, R., Higgins, S., Nesbitt, A., Dongol, E., … Kent, B. (2019). Video polysomnographic findings in non-rapid eye movement parasomnia. Journal of Sleep Research, 28(2), e12772. https://doi.org/10.1111/jsr.12772

McDonald, S., Williams, A., Barr, P., McNamara, N., & Marriott, M. (2021). Service user and eating disorder therapist views on anorexia nervosa recovery criteria. Psychology and Psychotherapy, 94(3), 721-736. https://doi.org/10.1111/papt.12340