Table 2.

Comparison of the technical features of the platforms and their applications.^3,38

Platform	Ethereum	Hyperledger Fabric	MultiChain
Type of Smart Contract	Second Generation	Second Generation	First Generation
Programming Language	Solidity, Serpent, and LLL63	Go and Node.js for Chaincode52	JavaScript for Smart Filter64
Network Permission	Permissioned/Permissionless	Permissioned	Permissioned
Open Source License	Go-Ethereum: LGPL v3.0,61 CPP-Ethereum: GPL v3.0,65 Py-Ethereum: MIT License,66 Ethereum J: GPL v3.0,67 and Parity: GPL v3.068	Apache License v2.069	GPL v3.070
Applications	MedRec,31,32 Patientory,71,72 Nebula Genomics,73,74 clinical data sharing,75 and patient monitoring.76	Clinical data sharing,77 Institutional Review Boards (IRB) regulation enforcement,78 mobile healthcare,79 and medical data storage/access.80	Privacy-preserving predictive modeling5,7 and its application in anesthesia.6