As noted, participating subjects will all receive PRP according to present standards of care; however, subjects will be randomized to either a 10-day course of oral Trientine at 1500mg administered for 7-days prior to and 3 days after the PRP sessions, or a placebo. Serum copper levels and urinary copper levels will be evaluated before and after Trientine administration to determine the amount of free copper present systemically at the time of PRP treatment.