Research articles published through the years 2010-2018 were collected using a systematic review from the data bases PubMed, Ebscohost and Web of Science.
Gerð var kerfisbundin heimildasamantekt (e. systematic review) þar sem rannsókna var aflað frá tímabilinu 2010-2018 í gagnasöfnunum PubMed, Ebscohost og Web of Science.