- New LightCycler PCR for rapid and sensitive quantification of parvovirus B19 DNA guides therapeutic decision-making in relapsing infections. Harder, T.C., Hufnagel, M., Zahn, K., Beutel, K., Schmitt, H.J., Ullmann, U., Rautenberg, P. J. Clin. Microbiol. (2001)