Single-Blind Method, Wounds and Injuries - microbiology, Skin - microbiology, Humans, Middle Aged, Postoperative Complications - prevention & control, Male, Treatment Outcome, Thoracic Surgery - methods, Young Adult, Postoperative Complications - microbiology, Adolescent, Disinfection - methods, Aged, 80 and over, Adult, Female, Aged, Preoperative Care - met...