13. A method to improve penile erectile function in a subject comprising injecting into the corpus cavernosum of the penis of the subject a composition comprising a substantially pure population of freshly isolated stromal vascular fraction (SVF) cells present in a biocompatible liquid three-dimensional matrix.
16. The method of claim 13 , wherein the composition comprises at least one additional cell type or population of relevant cells, selected from any in the group consisting of: corpus cavernosa cells, microvessel fragments.