[Perception of benefits, limit and social assistance on the elderly to accomplish physical activity].
Porras-Juárez
Concepción
C
Servicio de Nefrología, Hospital Infantil de Tlaxcala, Mexico.
Grajales-Alonso
Ignacio
I
Hernández-Cruz
María Concepción
MC
Alonso-Castillo
Ma Magdalena
MM
Tenahua-Quitl
Inés
I