TY  - RPRT
TI  - The prone position. Using gravity for a clear view.
AU  - J J Bannenberg
AU  - D W Meijer
AU  - P J Klopper
PY  - 1994
DO  - 10.1007/bf00705734
UR  - https://pubmed.ncbi.nlm.nih.gov/7992189/
ID  - 7992189
ER  -