Biological preparations for medical use for the treatment of damaged skin or tissue, namely, thrombin, platelet concentrate, platelet rich plasma, platelet poor plasma, fibrin gel, platelet rich fibrin, cell extracts, cell concentrates, stem cells, hyaluronic acid, chitosan, silk or any combinations thereof; Pharmaceutical preparations, namely, solutions for application on skin tissue for the purpose of promoting cellular regeneration; pharmaceutical skin lotions; tissues impregnated with pha...