Ok here's my question; I worked at a clinic for over a year, and have an awesome relationship with the clinic coordinator, a great relationship with the main NP, and a decent relationship with the doctor. Should I get them all to contribute a paragraph to a single letter with all their names signed at the bottom, write separate letters, or collaborate on one letter with the doctor signing it? I have 2 letters from research supervisors, and 3 letters from professors to choose from. Any thoughts welcome! thanks.