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Echocardiographic findings in haemodialysis patients according to their state of hydration María Cristina Di Gioia, Raul Gascuena, Paloma Gallar, Gabriela Cobo, Rosa Camacho, Nuria Acosta, Zsofia Baranyi, Isabel Rodriguez, Aniana Oliet, Olimpia Ortega, Inmaculada Fernandez, Carmen Mon, Milagros Ortiz, Mari C. Manzano, Juan C. Herrero, José I. Martinez, Joaquín Palma, Ana Vigil