(IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Lung cancer nodules imaged by micro-CT scanning. In these tumors, macrophages support regulatory T cells, which limit the efficacy of immunotherapy Credit © De Palma's Lab / EPFL Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.