[BMJ Publishing Group Ltd and British Thoracic Society British Thoracic Society Winter Meeting 2018, QEII Centre, Broad Sanctuary, Westminster, London SW1P 3EE, 5 to 7 December 2018, Programme and Abstracts - ()] Under pressure: an update in pulmonary vascular disease - P15 The characterisation and investigation of pulmonary arteriovenous malformations and cerebral abscess risk factors within a rare vascular disease: results from a targeted 125-question, international patient survey