LOR's needed for triple board program

I'm curious for the triple board psych/childpsych/peds program what kind of letters you would need to send to a program type like this. A letter from a psychiatrist, child psychiatrist and pediatrician? Would the letter writer have to write about your interest in the triple board or just how you'd be a good fit to their respective field?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Psychiatry Source Type: forums