Search strategy
We performed a systematic search for all available studies comparing
surgical outcomes of
the endoscope with the microscope in the databases of PubMed, Cochrane
library Ovid, Scopus, Google scholar, and ClinicalTrials; dating from
inception until 22 November 2019. We used the following keywords (in
different combinations): microscopic, endoscopic, type I tympanoplasty,
myringoplasty, chronic otitis media. Review articles and bibliographies
of each identified study were searched
for additional references that may contain further related studies.