Investigation of conditioned medium properties obtained from human umbilical cord mesenchymal stem/stromal cells preconditioned with dimethyloxalylglycine in a correlation with ultrastructural changes. - Olcar HN; Isildar B; Ozkan S; Ercin M; Gezginci-Oktayoglu S; Koyuturk M (Microscopy research and technique, 2024)