Information on the subject was gathered through various databases such as PubMed, Cinahl, ProQuest and Science Direct. Academic books found either online or at a library were also used.
Heimilda var aflað í gegnum gagnasöfn á við PubMed, Cinahl, ProQuest og Science Direct ásamt ýmsum fræðibókum, sem voru fengnar bæði af veraldarvefnum og á Landsbókasafni.