Definition of the Term "Disease Duration"

Answer of the ASIF vice president and president on a publication in which the duration since diagnosis is regarded as a possible definition of the term "disease duration" of ankylosing spondylitis

Scientific publications

Feldtkeller E, Erlendsson J: The definition of disease duration in ankylosing spondylitis: Comment on the article by Davis et al. published as "electronic letter" in Annals of Rheumatic Diseases : http://www.annrheumdis.com/cgi/eletters/65/11/1518#726, (12 Jul 2006). 

Feldtkeller E, Erlendsson J: Definition of disease duration in ankylosing spondylitis.  Rheumatology International 2008;28:693–696