Relationship of Visfatin and IGF-Ⅰ in Venous Blood with Calf Birth Weight

• FU Hongqing, 
• YAO Zhilan, 
• SHEN Liuhong, 
• XIAO Jingbang, 
• ZONG Jiali, 
• JIANG Tao, 
• ZHU Kai, 
• WEI Jinghong