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:The concerns around these have therefore not been about being medically unsafe, but about their marketing potentially overstating product effectiveness and exploiting existing sociocultural biases (Karnani, 2007; Agarwal and Roy, 2012).
Category: