6848
The OCT-1-binding genotype , found in approximately 5% of Africans , is associated with fourfold increased susceptibility to cerebral malaria in large case-control studies of West African and East African populations , after correction for other known TNF polymorphisms and linked HLA alleles .
 ( DNA: HLA alleles, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: HLA alleles, None) 