Table 4 Number of researchers with ORCiD ids that have more than 250 peer reviews in the years 2020-2022 by country of their most recent affiliation. The percentage overlap to researchers in the unusual author cohort either directly or via co-authorship is also shown.

From: Identifying fabricated networks within authorship-for-sale enterprises

Country

All high volume reviewers

Percentage directly connected (%)

Percentage connected via co-authorship (%)

China

103

9.71

55.34

India

82

2.44

47.56

Egypt

50

8.00

72.00

Iran

40

7.50

52.50

United States

35

5.71

37.14

Italy

34

2.94

41.18

Malaysia

33

18.18

60.61

Iraq

30

3.33

43.33

Pakistan

24

20.83

91.67

Saudi Arabia

23

30.43

91.30