The random allocation sequence will be obtained from a computer-generated list of random numbers in blocks of 10 supplied by a trial statistician. Concealed allocation is achieved by an independent research staff who assigns intervention group according to consecutive numbers in sealed envelopes. The patients will be invited to participate in the study to assess 1 of 2 potentially helpful interventions. They will be explained that the relative effectiveness of both interventions are unproven and may or may not be beneficial.