Eligibility criteria and study selection
Original studies that assess effectiveness and safety of HIFU in
management of PAS were considered eligible. Review articles, conference
papers, animal studies, and case reports were excluded. Neither sample
size nor language were used for exclusion.
To assess eligibility, titles of retrieved articles were first screened
for relevance. Thereafter, abstracts of filtered articles were reviewed
for eligibility. Following the second screen, full texts of
indeterminate articles were retrieved, and were assessed by 2
researchers, independently. Conflicting decisions were resolved by
consensus in collaboration with the principle investigator.