STAT6 and allergic disease: Interleukin (IL)-13, IL-4, interleukin 4 receptor (IL-4Ra), signal transducer and activator of transcription 6 (STAT6) and tumor necrosis factor-alpha (TNFα) genes are key inflammatory genes in the development of allergic diseases such as asthma [10], [11], [12], [13], [14], [15].