Assessment of body fat mass in morbid obesity: multifrequencial bioelectrical impedance vs. air displacement plethysmography - Horie, L. M.; Barbosa-Silva, M. C. G.; De Mello, M. T.; Halpern, A.; Cecconello, I.; Waitzberg, D. L. (Congress of the European Society for Clinical Nutrition and Metabolism ESPEN, 2006)