Inter-laboratory studies where laboratories perform testing on the same sample are valuable to demonstrate that a technique is reliable (see Chapter 16). As of early 2004, no manufacturers supply commercially available kits for the entire process of mtDNA sequencing, such as are available for STR typing. Thus, a number of different methods exist for mtDNA testing without a single universal protocol.
A number of inter-laboratory studies involving mtDNA sequencing have been conducted and have demonstrated that the same results can be successfully obtained in multiple laboratories using different protocols (Carracedo et al. 1998, Alonso et al. 2002, Prieto et al. 2003, Parsons et al. 2004, Tully et al. 2004).
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