HLA typing at DRB1 and at DQA1 and DQB1 loci was performed using PCR-amplified DNA and non radioactive sequence-specific oligonucleotide probes as described previously (8).
HLA typing at DRB1 and at DQA1 and DQB1 loci was performed using PCR-amplified DNA and non radioactive sequence-specific oligonucleotide probes as described previously (8).