Nitrosamines in antihypertеnsives, metformin and ranitidine as cofactors for melanoma and development of other cancers. Expert group opinion

Georgi Tchernev ¹, Simona Kordeva ², Viktor Marinov ³, Ilia Batashki ⁴, Atanas Batashki ⁵, James W. Patterson ⁶

¹ Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery; Department of Dermatology and Venereology, Medical Institute of Ministry of Interior, Sofia, Bulgaria; ² Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery, Sofia, Bulgaria; ³ Clinic of Purulent/Septic Surgery, Pirogov- University Multidisciplinary Hospital for Active Treatment and Emergency Medicine, Bulgaria; ⁴ Department of Dermatology and Venereology, Sofia, Bulgaria; ⁵ Department of Common and Vascular Surgery, Medical Institute of Ministry of Interior, Sofia, Bulgaria; ⁶ Department of Pathology, University of Virginia, Charlottesville, USA