<qa>  How long will Micafungin be infused?100 mg Micafungin will be infused over a period of sixty minutes via a central venous catheter, different from the venous catheter used for CVVHDF. Blood samples will be drawn on days 1 and 2 from the arterial and venous line of the extracorporeal circuit at 0, 2, 4, 6, 8 and 24h after starting the infusion. Plasma and ultrafiltration samples, collected from the outlet of the ultrafiltrate compartment of the hemofilter, will be taken at corresponding times. 