The Effect of Placenta Growth Factor Knockdown on hsa-miR-22-3p, hsa-let-7b-3p, hsa-miR-451b, and hsa-mir-4290 Expressions in MKN-45- derived Gastric Cancer Stem-like Cells Journal title: Middle East Journal of Cancer Authors: Zohreh Salehi, Hassan Akrami, Sajjad Sisakhtnezhad Subject(s):