@misc{indiciae7b987a557dd3, title = {Multi-level models for longitudinal growth norms.}, author = {H Pan and H Goldstein}, year = {1997}, doi = {10.1002/(sici)1097-0258(19971215)16:23<2665::aid-sim711>3.0.co;2-v}, url = {https://pubmed.ncbi.nlm.nih.gov/9421868/}, note = {Source identifier: 9421868} }