Dr Hetttie Janssens is a pediatric pulmonologist working in the ErasmusMC/ Sophia Children's Hospital in Rotterdam the Netherlands. She received her PhD from the Erasmus University of Rotterdam in 2001, with the subject Aerosol therapy in young children. From 2007-2011 she served as a boardmember for the International Society of Aerosols in Medicine (ISAM). In 2009 she was organizer of the ERS/ISAM school course on Medical Aerosols, and she was vice-president and chair of the scientific committee of the ISAM international congress in 2011. She was co-chair of ERS/ISAM taskforce: New inhalation therapies: what the pulmonary specialist needs to know, which was published in the ERJ in 2011. As clinical director of the pediatric CF clinic she co-ordinates the multidisciplinary care of around 150 children with CF since 2009. She is a member of various committees and working groups nationally on inhaled therapies and CF and contributed to national guidelines. She plays an active role in the quality guideline for CF in the Netherlands, and is organizer of a yearly national CF symposium. Her research focuses on inhaled therapy in children with lung diseases including CF and the development of early CF lung disease in infants. She is currently one the PI's in a NIH-R01 supported research project in collaboration with Dr. Rabin Tirouvanziam, Emory University, Atlanta. She is the author/co-author of over 50 scientific articles and book chapters. Dr Janssens serves on the editorial board of Journal of Aerosol in Medicines and Pulmonary Drug Delivery, and reviews manuscripts for various other scientific journals.