Ul Haq, H. B., Abbas, A., Khan, R. A., Akhtar, A. N., Akram, W., Nawaz, S., Mayo, F. I., & Bhatti, A. I. (2022). E-Healthcare Using Block Chain Technology and Cryptographic Techniques: A Review. Pakistan Journal of Engineering and Technology, 5(4), 21–28. https://doi.org/10.51846/vol5iss4pp21-28