1. Institute of Child Health; Intensive Therapy, Respiratory Medicine and Respiratory Physiology; 30 Guildford Street Great Ormond Street Hospital London UK WCIN 1EH
2. Great Ormond Street Hospital for Children NHS Trust; Cystic Fibrosis Unit; Level 4, Cardiac Wing Great Ormond Street London UK WC1N 3JH
3. Hanze University Groningen; P.O. Box 3109 Groningen Netherlands 9701 DC