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:In accordance to these results, recent work from our laboratory has shown decreased pulmonary expression of PPARc and BMPR2 signalling in the vasculature of nitrofen-induced CDH lungs on day 21 [6, 31].
Category: