Inclusion Criteria:

1. A histological diagnosis of primary NSCLC stage Ia

2. Surgical removal of the tumor

3. Age between 18 and 75 years

4. Ability to understand and the willingness to sign a written informed consent
document.

Exclusion Criteria:

1. A primary NSCLC stage Ia diagnosis that is changed to not primary NSCLC or NSCLC
stage Ib-IV after surgery.

2. Adjuvant treatment with chemotherapy.

3. Prior history of cancer in the past 5 years or breast cancer at any time.

4. Life expectancy less than 3 years in the opinion of the investigator due to
concurrent illnesses.