1. US pet ownership & demographics sourcebook: 2012 edition;AVMA,2012
2. Web of Knowledge. Availbale at: https://apps.webofknowledge.com. Accessed February 1, 2017.
3. Grading quality of evidence and strength of recommendations;BMJ,2004
4. Hyperadrenokortizismus beim Meerschweinchen. (Hyperadrenocorticism in the Guinea pig);Nowotny,2010
5. Cushing's syndrome in a guinea pig;Zeugswetter;Vet Rec,2007