TY  - RPRT
TI  - Open access echocardiography - guide or expense factor?
AU  - Klaus Tiemann
PY  - 2006
DO  - 10.1007/s10554-005-1807-9
UR  - https://pubmed.ncbi.nlm.nih.gov/16374529/
ID  - 16374529
ER  -