BioMed Central Page 1 of 1 (page number not for citation purposes) Health and Quality of Life Outcomes Open Access Retraction Retraction: Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire, short form 36 health survey, and functional assessment of chronic illness therapy-fatigue subscale Dennis A Revicki* 1 , Anne M Rentz 1 , Michelle P Luo 2 , Robert L Wong 3 , Lynda C Doward 4 and Stephen P McKenna 4 Address: 1 Center for Health Outcomes Research, United Biosource Corporation, Bethesda, MD, USA, 2 Formerly Abbott Laboratories, Global Health Economics & Outcomes Research, Abbott Park, IL, USA, 3 Abbott Laboratories, Abbott Immunology, Parsippany, NJ, USA and 4 Galen Research, Manchester, Lancashire, England, UK Email: Dennis A Revicki* - carrie.bray@jkmed.com; Anne M Rentz - anne.rentz@unitedbiosource.com; Michelle P Luo - mluo@yahoo.com; Robert L Wong - robert.wong@abbott.com; Lynda C Doward - ldoward@galen-research.com; Stephen P McKenna - smckenna@galen- research.com * Corresponding author Abstract Retraction of Revicki DA, Rentz AM, Luo MP, Wong RL, Doward LC, McKenna SP: Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire, short form 36 health survey, and functional assessment of chronic illness therapy-fatigue subscale. Health and Quality of Life Outcomes 2009, 7: 6. Retraction Not all authors approved of the final content or publica- tion of this article [1]. Subsequently, all authors have agreed that the article should be retracted. This article is being retracted as assumptions were made about the nature of the outcome data that should have been tested before the analyses were conducted. In addition, there is disagreement among the authors about the statistical analyses that were used and it is possible that incorrect conclusions may have been drawn that are not supported by the data presented. The authors wish to apologise for any inconvenience this may have caused the editorial, publishing staff and readers. References 1. Revivki DA, Rentz AM, Luo MP, Wong RL, Doward LC, McKenna SP: Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire, short form 36 health survey, and functional assessment of chronic illness therapy-fatigue sub- scale. Health and Quality of Life Outcomes 2009, 7:6. Published: 17 April 2009 Health and Quality of Life Outcomes 2009, 7:34 doi:10.1186/1477-7525-7-34 Received: 6 April 2009 Accepted: 17 April 2009 This article is available from: http://www.hqlo.com/content/7/1/34 © 2009 Revicki et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. . LC, McKenna SP: Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire, short form 36 health survey, and functional assessment of chronic illness therapy-fatigue. Abstract Retraction of Revicki DA, Rentz AM, Luo MP, Wong RL, Doward LC, McKenna SP: Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire, short form 36 health survey, and functional. 1 of 1 (page number not for citation purposes) Health and Quality of Life Outcomes Open Access Retraction Retraction: Psychometric characteristics of the ankylosing spondylitis quality of life