TF and amyotrophic lateral sclerosis: Low serum transferrin concentrations and TIBC were associated with a higher body weight loss at diagnosis in ALS patients (n = 72; adjusted R-squared 0.1245, P = 0.001 for correlation between transferrin and loss of weight and adjusted R-squared 0.1292, P = 0.001 for correlation between TIBC and loss of weight).