Hot thematic areas
| Keywords | Centrality | Frequency |
| big data* | 0.41 | 1225 |
| Internet of Things* | 0.32 | 536 |
| digital health* | 0.27 | 697 |
| could computing* | 0.23 | 344 |
| artificial intelligence* | 0.21 | 269 |
| monitoring* | 0.18 | 497 |
| machine learning* | 0.15 | 267 |
| neural network* | 0.14 | 322 |
| blockchain* | 0.13 | 210 |
| sensor* | 0.12 | 625 |
| electronic health record* | 0.12 | 437 |
| privacy* | 0.12 | 181 |
| robot | 0.08 | 217 |
| disease | 0.04 | 461 |
| diagnosis imaging | 0.04 | 219 |
| ecosystem | 0.04 | 104 |
| digital transformation | 0.01 | 100 |
| Health system | 0.01 | 230 |
| COVID-19 | 0.01 | 510 |
(Pivotal points: C≥0.1) Source: author.