To identify the type and extent of unmet needs in people with Parkinson's disease and to examine the impact of health locus of control and family support on these needs.. To read the full article, log in using your NHS Athens details. To access full-text: click “Log in/Register” (top right hand side). Click ‘Institutional Login’ then select 'OpenAthens Federation', then ‘NHS England’. Enter your Athens details to view the article.