The effect of paclitaxel plus carboplatin chemotherapy on subclinical cardiotoxicity in patients with non-small cell lung cancer: A speckle tracking echocardiography-based study Batur Gonenc Kanar; Ak¿n Ozturk; Alper Kepez; Dursun Akaslan; Murat Kavas; Erhan Ogur; Kamil Gu¿ls¿en; Akyan Ku¿p; Bahar Dalk¿l¿c¿; Kursat Tigen; Beste Ozben;