IL4 and asthma: Compared to the reference set, the most significant combinations are i) overall asthma IL13c.144/IL4-590*GT (p-value = 0.018); ii) persistent asthma IL13c.144/IL4-590*GT (p-value = 0.010) and iii) moderate-severe asthma IL4-590/IL4-RP2*T183 (p-value = 3x10-4).