42 Services for design, development, updates and maintenance of software, applications and software platforms; services for design, development, updates and maintenance of algorithms; computer programming in the medical field; computer program writing services for medical applications; design and development of software for use in the framework of medical technology; development of information systems and artificial intelligence computer systems for medical use; design and development of medical technologies; scientific research for medical purposes; design and development of apparatus for medical diagnosis and monitoring; development and testing of computing methods, algorithms and software; design of computer database software; computer database design and development; maintenance of databases; Software as a Service [SaaS]; computer Platform as a Service [PaaS]; scientific advisory services; user authentication services using blockchain technology; Blockchain as a Service [BaaS]; data storage by means of blockchains; data certification by means of blockchain; cryptocurrency mining