Recommendations for the Practice of Echocardiography in Infective Endocarditis
Eur J Echocard 11:202-207, Habib, G.,et al, 2010
Detection of Patent Foramen Ovale. Transesophageal Echocardiography and Transcranial Doppler Sonography With Ultrasound Contrast Media are "Supplementary, Not Competing, Diagnostic Methods"
Med Klin 94:367-370, Heckmann,J.G.,et al, 1999