Study of the fat-free mass obtained by two different body composition methods in patients with amyotrophic lateral sclerosis: Impedancemetry versus measurement of the four skin folds. (December 2020) - Rebière, F.; Fayemendy, P.; Sourisseau, H.; Calmel, N.; Preux, P.M.; Couratier, P.; Jésus, P.; Desport, J.C.