TY  - RPRT
TI  - A fresh look at an old question.
AU  - J J Williams
AU  - B E Marshall
PY  - 1982
DO  - 10.1097/00000542-198201000-00001
UR  - https://pubmed.ncbi.nlm.nih.gov/6797330/
ID  - 6797330
ER  -