ERAS Withdrawing a LOR?

Just wondering if I could get some insight on this situation. I submitted my application hastily to some programs without paying enough attention and I was an idiot and accidentally selected my chairman's letter to programs that only require 3 LOR's. I was just wondering if there was anyway that I could withdraw a letter I already sent. If possible, I would like to withdraw my chairman's letter and would obviously rather send 3 other LOR's since these will be stronger rather than my... ERAS Withdrawing a LOR?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums