TY  - RPRT
TI  - Letter: Follow-up needed?
AU  - W G Middleton
AU  - G J McHardy
PY  - 1976
DO  - 10.1016/s0140-6736(76)92764-1
UR  - https://pubmed.ncbi.nlm.nih.gov/57385/
ID  - 57385
ER  -