TNF and Plasmodium vivax malaria: Five TNF alleles polymorphism (TNF P-1, TNF P-2, TNF P-3, TNF P-4, TNF P-5) based on three SNPs of biallelic polymorphism sites (-857, -863, -1031) in patients with severe (SM), uncomplicated falciparum (UM) and vivax malaria (VM) cases when data were combined for the three ethnic groups