Monitoring (1) Diseases (1) Derivatives (1) Individual differences (1) Spleen (1) Ribs (1) Poliovirus (1) Poliomyelitis (1) Percentage (1) Necessity (Philosophy) (1) Licenses (1) Ivory (1) Enteroviruses (1) Difference (Psychology) (1) Country music (1) Average (1) Age (1) Paralysis (1) Quality (1) Autorizaciones (1) Virus de la poliomelitis (1) Necesidad (Filosofía) (1) Diferencia (Psicología) (1) Country (1) Bazo (1) Parálisis (1) Morbilidad (1) Poliomielitis (1) Enfermedades (1) Gaine (1)