Schwappach, D., K. Gehring, M. Battaglia, R. Buff, F. Huber, P. Sauter, and M. Wieser. “Threats to Patient Safety in the Primary Care Office: Concerns of Physicians and Nurses”. Swiss Medical Weekly, vol. 142, no. 2324, June 2012, p. w13601, doi:10.4414/smw.2012.13601.