Microarray design for HPV genotyping. (A) Eight-well platform hybridization reaction chamber. Each well contains 84 probes corresponding to the PCR control, the HPV-positive control, the HPV-negative control, and type-specific probes. (B) Schematic diagram of the HPV DNA microarray probe positions. GAPDH cDNA, HPV-positive controls (P.C), and HPV-negative controls (N.C) were spotted on the center of the slide. Each HPV type-specific probe was printed on the both sides, as shown, and all probes were printed in duplicate.