TY  - RPRT
TI  - EUS: an added test or a replacement for several?
AU  - P J Kelsey
AU  - A L Warshaw
PY  - 1993
DO  - 10.1055/s-2007-1010280
UR  - https://pubmed.ncbi.nlm.nih.gov/8491137/
ID  - 8491137
ER  -