I have been working on bone marrow derived mesenchymal stem cells, however, I intend to start work on dental pulp stem cells as well. Firstly, I need advice regarding transportation of dental pulp tissue from hospital to my institute (both in the same city). Will carrying the tissue in cold sterile saline solution suffice? Secondly, for disintegrating the tissue, I have been using a combination of collagenase and dispase. I want to know if trypsin can be used instead?