The present invention provides multiple-promoter expression cassettes for simultaneous delivery of RNAi, preferably to mammalian cells in vivo. The processor receives a callmessage and causes the memory to store data associated with the callmessage. The cooler receives and routes a coolant from a cooling source via internal channels. The rod connector may comprise a first housing component defining the first bore hole and a second housing component that is movable relative to the first housing component and defining the second bore hole.