Stem cell therapy for COVID-19 treatment: An umbrella review von Tang, Chaozhi, Dziedzic, Arkadiusz, Khatib, Mahalaqua Nazli, Alhumaid, Saad, Thangavelu, Lakshmi, Parameswari, R P, Satapathy, Prakasini, Zahiruddin, Quazi Syed, Rustagi, Sarvesh, Alanazi, Maha Afri, Al-Thaqafy, Majid S, Hazazi, Ali, Alotaibi, Jawaher, Al Faraj, Nehad J, Al-Zaki, Nisreen A, Al Marshood, Mona J, Al Saffar, Thuria Y, Alsultan, Khadija A, Al-Ahmed, Shamsah H, Rabaan, Ali A

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