For example, Banaei et al. [107] developed a SERS-based sandwich immunoassay platform in a microfluidic chip to quantify multiple protein biomarkers associated with pancreatic cancer, ovarian cancer, and pancreatitis (CA19-9, HE4, MUC4, MMP7, and mesothelin). Here, MUC4 is linked to familial pancreatic carcinoma.