TRPV1 and asthma: In subjects without asthma, 10 TRPV1 SNPs were associated with nocturnal cough (4.3 × 105 ≤ p ≤ 0.044), 6 TRPV1 SNPs were associated with usual cough (2.0 × 10-5 ≤ p ≤ 0.046), and 4 TRPV1 SNPs were associated with chronic cough (0.005 ≤ p ≤ 0.045) (Table 3).