I. Introduction
One of the most usual types of cancer in different countries is skin cancer, of which the incidence rate has increased during recent years [1]. Among all forms of skin cancers, melanoma is the deadliest one [2]. According to estimation of The American Cancer Society, in Unites States about 76380 new cases of melanoma will be diagnosed (46870 in men and 29510 in women) and about 10130 deaths from melanoma will occur (6750 in men and 3380 in women) in 2016 [3], [4].