Randomization Randomization will take place immediately after obtaining written consent. A statistical software package (SPSS - Statistical Program for the Social Sciences) will be utilized to randomly assign sequential numbers to one of the two treatment arms. Cards will be numbered sequentially and labelled with the treatment allocation. These cards will be placed in opaque envelopes in a box which will be kept in a locked cupboard to which the recruitment nurse holds the key. Envelopes will be opened in sequential order for each study participant after written informed consent has been obtained. A log book will be maintained by the research assistant detailing the patients approached, their decision to participate or not, randomization number, and allocation.