An Efficient MAC Protocol for Blockchain-Enabled Patient Monitoring in a Vehicular Network[J] APPLIED SCIENCES-BASEL 2022(12) Ullah, Muhammad Aman Alvi, Ahmad Naseem Javed, Muhammad Awais Khan, Muhammad Badruddin Abul Hasanat, Mozaherul Hoque Saudagar, Abdul Khader Jilani Alkhathami, Mohammed