The patients will be randomized after informed consent obtained into one of three groups: Group 1: Iodine povidone based skin preparation solution. Group 2: Chlorhexidine based skin preparation solution or Group 3: Combination usage of iodine povidone and chlorhexidine based skin preparation solutions. Sequentially numbered envelopes will contain the group of randomization for the patient created by a computer generated program which will occur prior to commencement of the study.