Acknowledgement
We thank Ingrid Delin for technical assistance with the analysis of PGD2. This study was supported by grants from the Swedish Research Council – Medicine and Health, the Swedish Cancer Society, the Swedish Heart Lung foundation, Ellen, Walter and Lennart Hesselman’s foundation, the Konsul TH C Bergh foundation, and through the regional agreement on medical training and clinical research (ALF) between Stockholm County Council and the Karolinska Institutet.