IL6 and rosacea: Taş-Aygar et al. [34] measured serum IL-6 and hypoxia-inducible factor-1α (HIF-1α) in 40 patients with rosacea (30 female, 10 male, aged 23–61 years, mean 40.25 ± 10.86) and 40 healthy controls (27 female, 13 male, aged 18–62 years, mean 39.7 ± 9.74).