“…We would like to thank Dr. Chen and his colleagues for their interest in and positive comments about our work (1). In lung cancer, even patients with pathological stage I nonsmall cell lung cancer (NSCLC), who have undergone a radical operation, including total tumor resection and systematic lymphadenectomy, may have recurrence rates between 25% and 40% and 5-year survival rates between 57% and 85% (2).…”