The quantity and quality of the DNA sample represents the most common factor affecting the performance of this technology. While buccal swabs represent an efficient and non-invasive method for DNA collection, the quality and quantity of sample is dependent on how many cheek cells are collected onto the brush. Too little DNA can result in a phenomenon call test dropout in which only a partial disease or DNA profile can be generated for that sample. To avoid this problem please read our detailed collection instructions which are included in all kits.
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