These backgrounders are designed to be an easily shareable and digestible introductory resource for HCPs new to each of the topics. The afatinib and nintedanib backgrounders cover the mechanisms of action and key clinical trial data. The ErbB Family backgrounder is designed to support the afatinib backgrounder providing further information on the ErbB Family of receptors, their role in cancer and the impact of mutations within this group. The mesothelioma backgrounder provides information on pleural mesothelioma, with a description of its clinical features, and an outline of the risk factors and treatment options for this type of cancer.