At a couple of programs I interviewed, we weren't given the contacts of the PD or other interviewers and was asked to send thank you notes through the PC. Now I want to send ranking email/letter of intent, is it okay to email the PD directly in this instance? For one program, I found the PD's email on Frieda but the other program, it's not listed but I can easily figure it out. Is it OK to do this?