- Correspondence to Dr Marieke L Duiverman, Department of Pulmonary Diseases/Home Mechanical Ventilation, University of Groningen, University Medical Center Groningen, Groningen 9713 GZ, The Netherlands;
- Received March 5, 2019
- Revised July 1, 2019
- Accepted July 11, 2019
- First published September 4, 2019.
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