"Genomewide linkage scan by a targeted high-density association scan for genetic variants enhancing persistently negative tuberculin skin test (PTST) in two independent Ugandan tuberculosis household cohorts. Association found with SNPs in neighboring genes ZEB2 and GTDC1 supported by both samples. Bioinformatic analysis suggests these variants may affect PTST- by regulating the histone deacetylase pathway."xsd:string