keywords 1.1 Normal biological development and functioning 2.1 Biological and endogenous factors 32 Biomedical and Clinical Sciences 3206 Medical Biotechnology 40 Engineering 4003 Biomedical Engineering 5.2 Cellular and gene therapies Bioengineering Generic health relevance Physical Injury - Accidents and Adverse Effects Regenerative Medicine Skin Stem Cell Research Stem Cell Research - Nonembryonic - Human Stem Cell Research - Nonembryonic - Non-Human Wound Healing and Care