Compassionate mesenchymal stem cell treatment in a severe COVID-19 patient: a case report. - Primorac D; Stojanović Stipić S; Strbad M; Girandon L; Barlič A; Frankić M; Ivić I; Marasović Krstulović D; Jukić I; Halassy B; Hećimović A; Matišić V; et al. (Croatian medical journal, 2021)