english: This life-threatening condition  occurs in about 30–50% of patients who receive donor cells  from anyone other than an identical twin, particularly when the stem cells  are collected from the blood  as opposed to the bone marrow.
non_english: Ova smrtonosna bolest događa se kod oko 30 do 50 procenata pacijenata koji prime ćelije od bilo koga ko nije njihov jednojajčani blizanac, posebno ako su matične ćelije uzete iz krvi, a ne iz koštane srži.