J Musculoskelet Disord Treat J Musculoskelet Disord Treat Intramedulary gas no related to infection Vives Barquiel Marian Ballesteros Betancourt José García Tarriño Raquel Llusá Pérez Manuel Claret Guillem Tomás Batlle Xavier García Torres Borja Navarro Guillem Estrada José Soriano Viladomiu Alex 2017 research-article