What is the maximum number of targets that can be amplified per reaction with the QuantiFast Multiplex RT-PCR Kit?

We have successfully tested up to 4 targets per reaction with the QuantiFast Multiplex RT-PCR Kit. A higher degree of multiplexing is achievable only on a limited number of PCR instruments (e.g., LightCycler 2.0). For these rare applications, further optimization of primer–probe concentration, cycling protocol, etc., might be needed.