Objective: To evaluate the value of oral Gd-DTPA as a negative contrast agent during magnetic resonance cholangiopancreatography (MRCP) to eliminate the high si
Objeetlve: To establish a sensitive and specific system for genotoxicity detection in vivo. Methods: Endogenous p53 tracer vector p53RE was constructed by using
<正>Objective: To know some genetical characterizations of Coxiella burnetii Chinese isolates by comparing the coml gene sequence. Methods: com1 gene sequences