In addition, choosing appropriate preprocessing procedures (background correction, normalization and summarization) is also very important for downstream analyses, including gene selection [ 16, 26, 31- 34].
However, a detailed analysis of the database on reported blood concentrations of BPA, considering the strengths and weaknesses of the analytical methodologies, sampling procedures, background contamination, and biological plausibility based on the toxicokinetics, needs to be performed to draw conclusions.
The procedure included background detection, background adjustment (BC-CG Adjust), quantile normalization, addition of small constants (CVStab), and summarization using a median polishing approach.
The most important procedure for background subtraction is the acquisition of background image B x, y).
Region segmentation procedure involves background scaling and redundant region elimination from the region set.
During postnatal testing, the 15 s Stimulation Sequence of the Experimental and Control melodies was delivered at 60±2 dB Leq, 62 dB peak level, measured with the sound level meter placed where the infants' head would be inside the testing chamber (see procedure). Background noise inside the chamber was 45±2 dB SPL.
Raw data were further normalized using Illumina's control probe scaling procedure and background subtraction [ 41].
For each type of measurement, an appropriate procedure for background correction has been developed.
The complete acquisition procedure, including background correction, and RGB visualization can now be performed within 6.5 seconds for a 224x224 pixel image.
25, 26 Since all patients are registered in the existing databases, equally valid procedure and background information is available for both study patients and nonstudy patients.
