Author Details

Zafiroski, Stole, <!DOCTYPE html> <html> <head> </head> <body> <p><span style="font-family: 'times new roman', times, serif; font-size: 12pt;">Medical University Prof. Dr. Paraskev&nbsp; Stoyanov, Varna</span></p> <p>&lt;span style="font-family: 'times new roman', ti, Bulgaria