**2.1. Data collection and dataset**

We accessed the data from Web of Science repository (https://apps.webofknowledge.com/) in December 2017–January 2018. The data have been filtered using the Advanced Search tool with the following syntax:

$$TS = \text{(topic 1)} \text{ AND } TS = \text{(topic 2)} \tag{1}$$

where *TS* is the topic; *AND* is the Boolean operator.

In our queries, we used as topic 1 "graphene" or "graphene oxide" or "graphene-related material," combined with the following keywords as topic "medicine," "biomaterials," "scaffold," "regenerative medicine," or "bioengineering." Then all the data sets obtained were merged with the "Combine Sets" tool. As a result, we obtained a dataset in .txt format containing a list of 1208 articles with their attributes. All the following analyses have been carried out on this data set:

