RPS6KB1 and neoplasm: EC patients had higher tumor Ki-67, PI3K, phospho-Akt, phospho-S6K1, and phospho-4E-BP1 at baseline than non-EC patientsMetformin decreased tumor Ki-67, PI3K, phospho-Akt, phospho-S6K1, and phospho-4E-BP1 in EC patients