@misc{indiciaeb7304a49dc88, title = {Subharmonic imaging with microbubble contrast agents: initial results.}, author = {W T Shi and F Forsberg and A L Hall and R Y Chiao and J B Liu and S Miller and K E Thomenius and M A Wheatley and B B Goldberg}, year = {1999}, doi = {10.1177/016173469902100201}, url = {https://pubmed.ncbi.nlm.nih.gov/10485563/}, note = {Source identifier: 10485563} }