@misc{indiciae53f1ee20cf4c,
  title = {Cross calibration in longitudinal studies.},
  author = {Walter T Ambrosius and Siu L Hui},
  year = {2004},
  doi = {10.1002/sim.1868},
  url = {https://pubmed.ncbi.nlm.nih.gov/15344190/},
  note = {Source identifier: 15344190}
}