Ultrasound guided Core Biopsy, Fine Needle Aspiration Cytology and Surgical Excision Biopsy in the diagnosis of metastatic squamous cell carcinoma in the head and neck: an eleven year experience - Saha, S; Woodhouse, N R; Gok, G; Ramesar, K; Moody, A; Howlett, D C (Eur J Radiol, 2011)