Measurement of visceral fat and abdominal obesity by single-frequency bioelectrical impedance and CT: a cross-sectional study oleh Karen Hind, Lin Ma, Li Xu, Zhengyang Xu, Yandong Liu, Chengxi Yan, Ruopei Yang, Zhe Guo, Aihong Yu, Xiaoguang Cheng, Chunhong Hu, Giuseppe Guglielmi