@misc{indiciae70d07c703200, title = {Studying symptoms: sampling and measurement issues.}, author = {K Kroenke}, year = {2001}, doi = {10.7326/0003-4819-134-9\_part\_2-200105011-00008}, url = {https://pubmed.ncbi.nlm.nih.gov/11346320/}, note = {Source identifier: 11346320} }