@misc{indiciaebb12f7057de3, title = {A privacy challenge to longitudinal study methods: patient-derived codes.}, author = {Fiona J Clay and Joan Ozanne-Smith and Wendy Watson and Melinda Congiu and Barbara Fox}, year = {2006}, doi = {10.1111/j.1467-842x.2006.tb00848.x}, url = {https://pubmed.ncbi.nlm.nih.gov/16956165/}, note = {Source identifier: 16956165} }