ADORA2A and bronchopulmonary dysplasia: Referring to these findings, Kumral et al. conducted a retrospective case-control study and found that ADORA1 (rs16851030) CC genotype carriers had better responsiveness to caffeine than CT or TT genotype carriers.They also revealed that the correlation between ADORA2A (rs35320474, rs5751876, rs3761422) CT or TT genotypes and vulnerability to AOP as well as the correlation between ADORA2A (rs35320474) CT or TT genotypes and greater risk of BPD (Kumral et al., 2012).