Several search engines were used (PubMed, Medline, Medical-Journals.com, eMedicine), and 222 abstracts were found and hand searched.
Биле користени неколку пребарувачи (PubMed, Medline, Medical-Journals.com, eMedicine), а биле пронајдени 222 апстракти и рачни пребарувања.