SUMMARY In the early days of the discovery of X-rays, it was widely used in the treatment of benign diseases such as some chronic infections and chronic skin conditions, however, with better recognition of side effects specially carcinogenecity of the radiation, their use in benign diseases are now restricted only to a few of non-malignant conditions, when all else has failed, and with the kno...

cough is a common reason for seeking medical advices for children. cough is a natural defense mechanism and can frequently occur in healthy children and can be increased by urban living and polluted cities. thus, previous history, cough exacerbations factors and quality of cough are very helpful in diagnosis of pathological cough. there are different definitions for chronic cough. in this artic...