Introduction. Merrill P. Spencer.
Moehring
Mark A
MA
Dobson
David T
DT
D000818:Animals; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010827:Physiology / Q000266:history*; D018608:Ultrasonography, Doppler / Q000266:history*; D014481:United States