TY  - RPRT
TI  - A geriatric survey repeated.
AU  - R L Meyrick
AU  - A Cox
PY  - 1969
DO  - 10.1016/s0140-6736(69)91660-2
UR  - https://pubmed.ncbi.nlm.nih.gov/4182702/
ID  - 4182702
ER  -