Contrast-enhanced doppler imaging: comparison with scintigraphic phases of revascularization of the femoral head in Legg-Calve-Perthes disease - Doria, Andrea S.; Guarniero, Roberto; Godoy Junior, Rui Maciel de; Buchpiguel, Carlos Alberto; Modena, Marcelo; Cunha, Fabiano G.; Luzo, Carlos; Molnar, Laszlo Jozsef; Sapienza, Marcelo Tatit; Cerri, Giovanni Guido (Journal of Pediatric Orthopaedics, 2002)