 One of the following PCEA treatment protocols will be started in a randomized, double blind fashion. A random number table for 60 patients is generated in Excel using the Randbetween function. This function randomly generates 60 numbers either 1 or 2. When a series is generated that contains 30 1s and 30 2s, this series is selected as the random code for the study. A patient is assigned to group 1 or 2 based on the next available number. This patients name is then entered next to this number on the rand code table. 