This work was carried out in collaboration between all authors. Author JE designed the study, DNA purification from blood samples, HLA and DRB1 typing, wrote the protocol, and wrote the first draft of the manuscript. Author DK performed the HLA and DRB1 typing, managed the literature searches and wrote draft of the manuscript. Author VJ managed the literature searches, performed the statistical analysis. Authors GS and LV gathered and formed a group of patients. Author AS managed the analyses of the study. Authors JG and AK performed the statistical analysis. All authors read and approved the final manuscript.

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Author DK designed the study, DNS purification from blood samples, HLA DRB1 typing, wrote the protocol, and wrote the first draft of the manuscript. Author EE performed the statistical analysis and HLA DRB1 TYPING, managed the literature searches, wrote draft of the manuscript. Authors VJ and ED managed the literature searches. Authors GS and LV gathered and formed a group of patients. Author AS managed the analyses of the study. Author LK performed DNS purification from blood samples, managed the literature searches, wrote draft of the manuscript. All authors read and approved the final manuscript.

No abstract