@misc{indiciae285cec333b81, title = {Proficiency testing in cytology--does it have any value?}, author = {G K Nagy and D N Collins and L E Newton}, year = {1995}, doi = {10.1002/dc.2840120424}, url = {https://pubmed.ncbi.nlm.nih.gov/7656763/}, note = {Source identifier: 7656763} }