TY  - RPRT
TI  - Letter: Cholecystographic modifications to improve initial study opacification.
AU  - C E Shopfner
PY  - 1975
DO  - 10.1001/jama.1975.03260180019005
UR  - https://pubmed.ncbi.nlm.nih.gov/1242160/
ID  - 1242160
ER  -