BioMed Central Page 1 of 1 (page number not for citation purposes) Health and Quality of Life Outcomes Open Access Research Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire,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, 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- ldoward@galen-research.com; Stephen P McKenna - smckenna@galen- research.com * Corresponding author The authors have withdrawn this article from the public domain because the conclusions drawn may not be sup- ported by the data. In the light of this situation, BioMed Central regrets that this article is no longer available. The authors apologise to all parties for the inconvenience. Published: 30 January 2009 Health and Quality of Life Outcomes 2009, 7:6 doi:10.1186/1477-7525-7-6 Received: 15 September 2008 Accepted: 30 January 2009 This article is available from: http://www.hqlo.com/content/7/1/6 © 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. . Central Page 1 of 1 (page number not for citation purposes) Health and Quality of Life Outcomes Open Access Research Psychometric characteristics of the ankylosing spondylitis quality of life questionnaire,. 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 ,. that this article is no longer available. The authors apologise to all parties for the inconvenience. Published: 30 January 2009 Health and Quality of Life Outcomes 2009, 7:6 doi:10.1186/1477-7525-7-6 Received: