Family relationships (1) Walking (1) Sports records (1) Questionnaires (1) Purchasing power parity (1) Prosthesis (1) Proportion (1) Hand (1) Gait in humans (1) Friendship (1) Force and energy (1) Foot (1) Athletic ability (1) Artificial legs (1) Ability (1) Rehabilitation (1) Locomotion (1) Authorship (1) Friends and associates (1) Family (1) Piernas--Prótesis (1) Paridad del poder adquisitivo (1) Energía (Física) (1) Amputación (1) Pies (1) Manos (1) Rehabilitación (1) Amistad (1) Prótesis (1) Proporción (1)