ΗΙF1α, EGR1 and SP1 co-regulate the erythropoietin receptor expression under hypoxia: an essential role in the growth of non-small cell lung cancer cells oleh Tianhong Su, Pi Liu, Xinyu Ti, Shouzhen Wu, Xiaochang Xue, Zenglu Wang, Elhardji Dioum, Qiuyang Zhang