The article "Factors affecting plaque formation by bacteriophages" has been updated to reflect research by Luhtanen et al., 2018* on cold-active phages.
*Luhtanen,A.-M.,Eronen-Rasimus,E., Oksanen,H.M., Tison,J.-L., Delille,B.,Dieckmann,G.S.,Rintala,J.-M. and Bamford,D.H. (2018). The first known virus isolates from Antarctic sea ice have complex infection patterns. FEMS Microbiology Ecology, 94, 4, 1-15. (available from https://doi.org/10.1093/femsec/fiy028).