Inclusion Criteria:

- Primary tissue from patient's surgery must be Epidermal growth factor receptor
(EGFR)-positive by certain tests

- Patients may have up to 4 cycles of chemotherapy after surgery

- Complete removal of the tumor by surgery

- Able to start drug under the following timelines:

- 6 months from the day of surgery for patients who get chemotherapy

- 3 months from the day of surgery for those who do not get chemotherapy

- Confirmed diagnosis of Stage IB-IIIA NSCLC

- Patients must be accessible for follow-up visits

Exclusion Criteria:

- History of prior radiotherapy for NSCLC either before or after surgery

- History of heart disease or uncontrolled heart arrhythmias within the previous year

- History of poorly controlled Gastrointestinal (GI) disorders that could affect the
absorption of study drug

- History of other cancer except certain skin or cervical cancers, Patients who have
had other cancer are eligible if they have remained disease free for at least 5 years

- Patients who have received chemotherapy for NSCLC before surgery

- Tumors with mixed histology of NSCLC and Small Cell Lung Cancer (SCLC). Patients with
carcinoid tumors are not eligible