TY  - RPRT
TI  - Letter: Masked primary (or tertiary) hyperparathyroidism.
AU  - W M Keynes
AU  - T D Hockaday
PY  - 1975
DO  - 10.1016/s0140-6736(75)90578-4
UR  - https://pubmed.ncbi.nlm.nih.gov/51315/
ID  - 51315
ER  -