“…Apart from the patients suffering from de novo PNH, pathological links to other stem cell disorders like AA and MDS have often been described (Jin et al., 1996; Nishimura et al., 1996; Teramura & Mizoguchi, 1996; Viniou et al., 1997; Iwanaga et al., 1998; Azenishi et al., 1999; Schrezenmeier et al., 2000; Socie et al., 2000). For example, in a study investigating 40 patients with MDS, 10% of the patients showed an increased percentage of GPI‐deficient cells (Iwanaga et al., 1998).…”