TY  - RPRT
TI  - Resolution of age-dependent reference intervals: polynomial regression methodology with applicability to plasma zinc levels in a childhood population.
AU  - G P Butrimovitz
AU  - W C Purdy
PY  - 1979
DO  - 10.1016/s0009-9120(79)90056-0
UR  - https://pubmed.ncbi.nlm.nih.gov/445790/
ID  - 445790
ER  -