. 2020 Mar 4;2019:1266–1275.

Table 1.

Technical features to compare smart contract blockchain platforms.

Technical Feature	Description
Type of Smart Contract	The typ of smart contract supported in the platform, can be either first generation (i.e., supports scripting functions without full programming capacity such as looping) or second generation (i.e., supports any algorithm).
Programming Language	The language for smart contract (e.g., Solidity^40-42 for Ethereum^{11, 43}).
Network Permission	The supported permission type of blockchain network, can be permissionless (i.e., any machine can join the network freely, as for Bitcoin Blockchain), permissioned (i.e., only an authenticated machine can join the network), or both.
Open Source License	The license to distribute derivative products (e.g., MIT⁴⁴ or GPL⁴⁵)
Applications	Proposed applications in healthcare.