Several graphical techniques for checking the proportional-hazards assumption of Cox's semiparametric regression model for censored survival data are discussed, and some numerical tests to support the ...

Importance/background The 12-lead ECG is recommended in clinical guidelines for prehospital assessment of patients with ...

Heavy Metal Stress, Physiological Response, Osmoregulatory Substances, Antioxidant Enzymes Share and Cite: Peng, S. , Zhang, ...

Background Stroke volume is an established echocardiographic marker but has not been widely studied in patients with ...