Investigation of interleukin-4 (IL-4) and leukotriene C4 synthase (LTC4S) genes in patients with asthma by next-generation sequencing analysis - Muhammet Mesut Nezir Engin; Önder Kılıçaslan; Recep Eröz; Öner Özdemir; Ramazan Temizkan; Kenan Kocabay (Alergologia Polska)