原文见:Carduff E,Finucane A,Kendall M,et al.Understanding the barriers to identifying carers of people with advanced illness in primary care: triangulating three data sources[J].BMC Fam Pract,2014,15:48.doi:10.1186/1471-2296-15-48.Published at http://www.biomedcentral.com/1471-2296/15/48