RETRACTION
Volume 41, no. 8, p. 3584–3591, 2003, https://doi.org/10.1128/JCM.41.8.3584-3591.2003. The authors hereby retract this article. The authors have been alerted that Figure 4A and B do not accurately reflect the original images. Specifically, unexpected differences in background patterns and rectangular shaped transitions become visible in certain areas if images are made lighter, which indicates potential splicing.
The corresponding author assumes all responsibility for this figure problem. Since the original PFGE gel pictures are no longer available, it is not possible to submit a corrected figure.
The authors sincerely regret this problem necessitating retraction of this article.