Cancer Vaccine Study for Unresectable Stage III Non-small Cell Lung Cancer (START)

Inclusion Criteria:

* Histologically or cytologically documented unresectable stage III non-small cell lung cancer (NSCLC)
* Documented stable disease or objective response, according to Response Evaluation Criteria in Solid Tumors (RECIST), after primary chemoradiotherapy (either sequential or concomitant) for unresectable stage III disease, within 4 weeks (28 days) prior to randomization
* Receipt of concomitant or sequential chemoradiotherapy, consisting of a minimum of two cycles of platinum-based chemotherapy and a minimum radiation dose of \>=50 Gray (Gy). Subjects must have completed the primary thoracic chemo-radiotherapy at least four weeks (28 days) and no later than 12 weeks (84 days) prior to randomization. Subjects who received prophylactic brain irradiation as part of primary chemo-radiotherapy are eligible
* Geographically accessible for ongoing follow-up, and committed to comply with the designated visits
* An Eastern Cooperative Oncology Group (ECOG) performance status of 0-1
* A platelet count \> 140 x 10\^9/Liter; white blood cells (WBC) \> 2.5 x 10\^9/Liter and hemoglobin \> 90 gram per liter (g/L)

Exclusion Criteria:

Pre-Therapies:

* Undergone lung cancer specific therapy (including surgery) other than primary chemo-radiotherapy
* Receipt of immunotherapy (e.g. interferons, tumor necrosis factor \[TNF\], interleukins, or biological response modifiers \[granulocyte macrophage colony stimulating factor {GM-CSF}, granulocyte colony stimulating factor {G-CSF}, macrophage-colony stimulating factor {M-CSF}\], monoclonal antibodies) within 4 weeks (28 days) prior to randomization
* Receipt of investigational systemic drugs (including off-label use of approved products) within 4 weeks (28 days) prior to randomization

Disease Status:

* Metastatic disease
* Malignant pleural effusion at initial diagnosis and/or at study entry
* Past or current history of neoplasm other than lung carcinoma, except for curatively treated non-melanoma skin cancer, in situ carcinoma of the cervix or other cancer curatively treated and with no evidence of disease for at least 5 years
* Autoimmune disease
* A recognized immunodeficiency disease including cellular immunodeficiencies, hypogammaglobulinemia or dysgammaglobulinemia; subjects who have hereditary or congenital immunodeficiencies
* Any preexisting medical condition requiring chronic steroid or immunosuppressive therapy (steroids for the treatment of radiation pneumonitis are allowed)
* Known Hepatitis B and/or C

Physiological Functions:

* Clinically significant hepatic dysfunction
* Clinically significant renal dysfunction
* Clinically significant cardiac disease
* Splenectomy
* Infectious process that in the opinion of the investigator could compromise the subject's ability to mount an immune response

Standard Safety:

* Pregnant or breast-feeding women, women of childbearing potential, unless using effective contraception as determined by the investigator
* Known drug abuse/alcohol abuse
* Legal incapacity or limited legal capacity