A case series on safety and tolerability of human umbilical cord-derived mesenchymal stem cells on patients in Malaysia oleh Basmullah Yusof, Iqmaliza Kamal, Ka Man Lee, Siong Kiat Chai, Xia Lin Zuo, Manickam Ravichandran, Ke Xiang Ding, Neeraj Kumar Fuloria, Seng Kong Tham