tips Dysregulated cholinergic network as a novel biomarker of poor prognostic in patients with head and neck squamous cell carcinoma May 9, 2015 BMC Cancer 2015, 15:385 doi:10.1186/s12885-015-1402-y Ana Cristina Castillo-González and Susana Nieto-Cerón contributed equally to this work. Published: 10 May 2015