Figure 1: Experimental designs of Loop 1 (for the training set) and Loop 2 (for the test set). Each arrow indicates a microarray hybridization experiment. The arrow heads and tails represent samples labeled with Cy5 and Cy3, respectively. The black solid circles stand for the SDP samples and the open circles stand for non-SDP samples. Loop 1 is the experimental design for the training set of 12 individuals. Loop 2 is the experimental design for the test set of the other 12 individuals. The annotations of samples in Loop 1 and Loop 2 are shown below each loop.