Rapid transition to distance learning due to COVID-19: Perceptions of postgraduate dental learners and instructors Rad, Fatemeh Amir ; Otaki, Farah ; Baqain, Zaid ; Zary, Nabil ; Al-Halabi, Manal Abstract Publication: PLoS ONE Pub Date: February 2021 DOI: 10.1371/journal.pone.0246584 Bibcode: 2021PLoSO..1646584R