Inclusion Criteria:

- adult patients, >=18 years of age;

- documented squamous non-small cell lung cancer;

- stage IIIb with pleural or pericardial effusion, stage IV, or recurrent disease;

- suitable for platinum-based treatment as first line chemotherapy.

Exclusion Criteria:

- prior systemic anti-tumor therapy;

- prior radiotherapy for treatment of patient's current stage of disease;

- other primary tumors within last 5 years, except for controlled limited basal cell or
squamous cancer of the skin, or cancer in situ of the cervix;

- major surgery, open biopsy or significant traumatic injury within 28 days prior to
randomization.