| Date of last search for all years available: 17 July 2018. | |
| Registry | Search terms |
| ClinicalTrials.gov (www.ClinicalTrials.gov) | deoxyribonuclease, DNase, dornase, pulmozyme |
| World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP) Search Portal (apps.who.int/trialsearch/) | deoxyribonuclease, DNase, dornase, pulmozyme |