CD34 and systemic lupus erythematosus: While Loh et al. only looked for the influence of the conditioning regimen as a risk factor for the development of sAD, Daikeler et al. also defined other risk factors for sAD: systemic lupus erythematosus (SLE), short interval between diagnosis and aHSCT, and the use of ATG in combination with CD34+-selection were significant risk factors in their analysis.