@misc{indiciaeb6116246ef49, title = {Epidemiology for the uninitiated. Repeatability and validity.}, author = {G Rose and D J Barker}, year = {1978}, doi = {10.1136/bmj.2.6144.1070}, url = {https://pubmed.ncbi.nlm.nih.gov/709223/}, note = {Source identifier: 709223} }