Mapping Research Trends of Blockchain Technology in Healthcare[J] IEEE ACCESS 2020(8) Anjum, Hira Fariha Rasid, Siti Zaleha Abdul Khalid, Haliyana Alam, Md. Moshiul Daud, Salwani Mohd Abas, Hafiza Sam, Suriani Mohd Yusof, Muhammad Fathi