1. Quality management in acute pain therapy: results from a survey of certified hospitals;AB Böhmer,2012
2. Postoperative pain management on surgical wards in one university hospital: short- and medium-term effects of a quality assurance program;C Cornet,2007
3. Reducing pain in patients undergoing cardiac surgery after implementation of a quality improvement postoperative pain treatment program;M Diby,2008
4. Perception of barriers to postoperative pain management in elderly patients in Polish hospitals with and without a “Hospital Without Pain” Certificate—a multi-center study;WA Mędrzycka-Dąbrowska,2016
5. Does the Pain-free hospital certification improve the management of pain following hernioplasty?;I Smietańska,2010