TY  - RPRT
TI  - Prone or supine?
AU  - R J Bray
AU  - T A Piggot
AU  - C A Reid
PY  - 1989
DO  - 10.1136/adc.64.3.429-b
UR  - https://pubmed.ncbi.nlm.nih.gov/2705815/
ID  - 2705815
ER  -