Results and discussion
The 850 sequences selected were analysed in both the HV1 and HV2 regions. Not all of the stored sequences were of the same length as they had been analysed by several institutes employing different primers. Hence, they were not directly comparable. As a compromise the overlapping sections of all sequences in a range from 16 051 to 16 365 in HV1 and from 73 to 340 in HV2 were analysed, i.e. the HV1 region was almost completely and the HV2 region was completely covered