Hi. My college doesn’t offer a committee letter of recommendation so I am in the process of collecting individual letters. I see that many med schools ask for three letters, from professors who have taught you a class. I worked on my research lab for 8 semesters and all those semesters I was matriculated in a research course for 3 credits. Will my PI letter suffice the requeriment since I wasn’t technically taking a course with him, but I received credits and was graded for my work. Thanks for all.