I have a serious sinus condition that is a manifestation of blood contaminates. I am looking into purchasing a GB4000 and would like any input from users of this machine. I'm new to the group.
The most efficient machine in the market at this point is the The Quantum, although it is pricey.
For additional information on the Rife try: http://www.holman.net/rife/Q_As/q_as.html