What is the fine-grained topic of the following text: This is illustrated in a new study; led by Philipos Philippides, PhD, of the London Imperial College London, which was presented at the International Congress of the European Pulmonary Society in Milan, and includes data for the 28 EU Member States. Only return the topic.
A new study led by Philipos Philippides on data for the 28 EU Member states presented at the International Congress of the European Pulmonary Society in Milan.