1. 2) Hurley R: Can doctors reduce harmful medical overuse worldwide? BMJ 349: g4289, 2014.
2. 3) Levinson W, et al: 'Choosing Wisely': a growing international campaign. BMJ Qual Saf 24: 167-174, 2015.
3. 4) Bhatia RS, et al: Measuring the effect of Choosing Wisely: an integrated framework to assess campaign impact on low-value care. BMJ Qual Saf 24: 523-531, 2015.
4. 5) Ahn HS, et al: Korea's thyroid-cancer "epidemic" -screening and overdiagnosis. N Engl J Med 371: 1765-1767, 2014.
5. 6) Moynihan R, et al: Preventing overdiagnosis: how to stop harming the healthy. BMJ 344: e3502, 2012.