Сколько угодно.
Novbar, Alexandra N.; Melevchik, Michael; Karavassilis, Maria; Dehbi, Hakim-Mulai; Shun-Shin, Matthew J.; Jones, Siana; Howard, James P.; Cole, Graham D.; Francis, Darrell P. [url=https://StemCellsPriceGuide.com/]https://StemCellsPriceGuide.com[/url] (April 28, 2014). “Discrepancies in research autologous bone marrow stem cells and increased ejection fraction (DAMASCUS): weighted regression and meta-analysis”.