Accuracy of direct segmental multi-frequency bioimpedance analysis in the assessment of total body and segmental body composition in middle-aged adult population - Ling, CH Y; de Craen, AJ M; Slagboom, P E; Gunn, D A; Stokkel, MP M; Westendorp, RG J; Maier, A B (Clin Nutr, 2011)