References
- Phillips A, Reddy S, Durning S. 2015. Improving response rates and evaluating nonresponse bias in surveys: AMEE Guide No. 102. Med Teach. Available from: http://dx.doi.org/10.3109/0142159X.2015.1105945
- Caldwell J. 2007. Clickers in the large classroom: current research and best-practice tips. CBE – Life Sciences Edition. 6:9–20