#4 Reminds me of the Statue of Liberty not a good thing. I like the use of solid colors and i think out of all of the submissions you are on the right track. I don't really care for either of the logos but i have ranked you 1st because i think you are doing the best. Keep going and submit some other ideas. I like the idea of having a blue or blue/green heart as part of the logo... Try to incorporate more of a medical elements into it...