Comment on

• Point: bias from the "healthy-warrior effect" and unequal follow-up in three government studies of health effects of the Gulf War.

  Haley RW. Haley RW. Am J Epidemiol. 1998 Aug 15;148(4):315-23. doi: 10.1093/oxfordjournals.aje.a009645. Am J Epidemiol. 1998. PMID: 9717872 No abstract available.
• Factor analysis of self-reported symptoms: does it identify a Gulf War syndrome?

  Knoke JD, Smith TC, Gray GC, Kaiser KS, Hawksworth AW. Knoke JD, et al. Am J Epidemiol. 2000 Aug 15;152(4):379-88. doi: 10.1093/aje/152.4.379. Am J Epidemiol. 2000. PMID: 10968383