Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Diarrhea as observed in the broiler chicks treated with CY (Sharaf et al., 2009) might have lead to excess fluid loss and can be correlated with hemoconcentration, which might have resulted in increased total plasma proteins in the present study.
Category: