Media type: E-Article Title: Acid sphingomyelinase activity as an indicator of the cell stress in HPV-positive and HPV-negative head and neck squamous cell carcinoma Contributor: Gerle, Mirko; Medina, Tuula Peñate; Gülses, Aydin; Chu, Hanwen; Naujokat, Hendrik; Wiltfang, Jörg; Açil, Yahya Published: Springer Science and Business Media LLC, 2018 Published in: Medical Oncology, 35 (2018) 4 Language: English DOI: 10.1007/s12032-018-1117-4 ISSN: 1357-0560; 1559-131X Origination: Footnote: