Heart Rate Variability Assessment Using Time–Frequency Analysis in Hypotensive and Non-Hypotensive Patients in Hemodialysis.By Brayans Becerra-Luna, Raúl Cartas-Rosado, Juan Carlos Sánchez-García, Raúl Martínez-Memije, Oscar Infante, Claudia Lerma, Héctor Pérez-Grovas, José Manuel Rodríguez-Chagolla, Gabriel Sánchez-Pérez and Miguel Cadena-Méndez
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