Table 4.

Co-citation clusters on e-learning during COVID-19.

No	Cluster label	Representative articles
1	e-learning and technology adoption	Fornell and Larcker (1981), Venkatesh et al. (2003),Henseler et al. (2015), Hair et al. (2017), Almaiah et al. (2020)
2	Distance education and COVID-19	Braun and Clarke (2006), Moore et al. (2011), Hodges et al. (2020), Garrison et al. (1999)
3	Challenges and mitigation of e-learning	Dhawan (2020), Bao (2020), Adnan and Anwar (2020), Toquero (202)
4	Medical education during COVID-19	Ferrel and Ryan (2020), Mukhtar et al. (2020), Rose (2020)
5	Student mental health	Cao et al. (2020), Sahu (2020), Aristovnik et al. (2020), Odriozola-Gonzá lez et al., 2020, Elmer et al. (2020)