AMPD1 Genotypes and Exercise Capacity in McArdle Patients - Rubio, J C; Pérez, M; Maté-Muñoz, J L; García-Consuegra, I; Chamorro-Viña, C; Fernández del Valle, M; Andreu, A L; Martín, M A; Arenas, J; Lucia, A (International Journal of Sports Medicine, 2008)