Delivering Optimal Care to People with Cognitive Impairment in Parkinson's Disease: A Qualitative Study of Patient, Caregiver, and Professional Perspectives.

"Conflicts of Interest The authors declare that there are no conflicts of interest."

"We would like to thank the Patient and Public Involvement Group for their input to this research: Karla Lee, Maria Carmody, Mary Carmody, Anne Godfrey, and Ruth Green. We would also like to thank all participants of the study. This report is independent research funded by a joint research fellowship from Rosetrees Trust and the Royal College of Physicians (Grant no. RCP-2020\11), the National Institute for Health Research (NIHR) (Grant no. RP-PG-1016-20001), and the NIHR School of Primary Care Research (Grant no. SPCR-2014-10043). The views expressed in this publication are those of the authors and not necessarily those of the NHS, the National Institute for Health Research or the Department of Health. Open access funding was enabled and organized by JISC."