Tchavdar Nikolov Shalganov , Dora Paprika , Radu Vatasescu , Attila Kardos , Attila Mihalcz , Laszlo Kornyei , Andras Szatmari and Tamas Szili-Torok
Cardiovascular Ultrasound 2007, 5:13doi:10.1186/1476-7120-5-13