Hello friend, it would be very important for us within the HeartStem community if you could provide us with some references consulted and/or recommended on the subject you are dealing with.

Another point is that the sources of images do not specify clearly the site where you are taking the images, since one of the rules to qualify for support from the community is that the images are public domain, for example you can use images from pixabay that are public domain, or otherwise that the images are the author's own.