Fig. 1

Boxplot of the log-transformed ratios of FdPV2 to GAPDH molecule numbers. The positive controls (C^pos _paw, C^pos _head) and the negative controls (C^neg _paw, C^neg _head) are shown as white boxes and the samples (S_paw, S_head) as grey boxes. The solid bar represents the median, the box range from the first to the third quartiles, and the whiskers extend to the lowest and highest datum still within 1.5 times the interquartile range. Data not included within the whiskers are individually presented