A precise comparison between various quantification techniques is only possible when samples are collected from the same location using the same collection device.
Less than 24 h after birth, exfoliated oral and genital cells were collected from the subset of clean neonates using the same collection device used for HPV DNA detection.
For quality control (QC), in 2011 we collected spot urine specimens from 10 Norwegian women using the same collection protocol and materials used for MoBa participants, except that the specimens did not require shipping because they were collected from processing facility staff.
In this study, using the same collection method, we eliminated the effects of the sample collection method.
In 2002 to 2003, 2,005 of these women provided a second urine sample using the same collection and shipment methods as the initial collection.
The H1N1 data measures the same set of genes, but on a separate set of 19 subjects, using the same collection methodology.
In a recent study, the in vitro sensitivity and specificity of MRSA ID (bioMérieux, La-Balme-Les-Grottes, France) was evaluated using the same collection of strains [ 9].
In another study, Diederen et al. evaluated the in vitro sensitivity and specificity of CHROMagar MRSA (CHROMagar Microbiology, Paris, France), using the same collection of strains [ 8].
Previous studies using the same collection have, however, found a consistency between seroprevalence for other vaccine preventable infections and population vaccine coverage data (Osborne et al, 2000).
A second analysis of recombination events included pairs of strains isolated recently (within 25 months) from the same geographical location (shallow coastal water in the Miyazaki prefecture), using the same collection technique (see Materials and Methods).
