Prevalence and co-incidence of geriatric syndromes according to the ECOG performance status in older cancer patients oleh Atakan Topcu, Ayse Irem Yasin, Mehmet Besiroglu, Zehra Sucuoglu Isleyen, Zeynep Alaca Topcu, Melih Simsek, Haci Mehmet Turk, Mesut Seker, Pinar Soysal