Rh DNA--coordinator's report.

Four laboratories contributed to molecular analysis of 66 Rh variant samples originating from 12 countries. Most studies were carried out on genomic DNA using allele-specific-PCR, PCR-RFLP or nucleotide exon sequencing. In some cases, the molecular basis of some new phenotypes was established by DNA sequence analysis and the basis for the DVIE haplotypes was revisited.