Pharmaceutical Welcome to The Pharma Letter’s new column, RARE: Illuminating Orphan Diseases. Each column will take a deep dive into a rare disease – its cause, epidemiology, and treatment. Key questions will be answered: What is pharma doing for this disease? What still needs to be done? Are there any innovative treatments in the pipeline? We want to give rare disease patients a voice by shining a light on their condition and highlighting where further investment might be needed. 17 September 2018