[1] Oslo Univ Hosp, Dept Haematol, Oslo, Norway
[2] Ersta Skondal Bracke Univ Coll, Dept Hlth Care Sci, Stockholm, Sweden
[3] Uppsala Univ, Dept Womens & Childrens Hlth, Healthcare Sci & E Hlth, Uppsala, Sweden
[4] Lovisenberg Diaconal Univ Coll, Oslo, Norway
[5] VID Specialized Univ, Fac Hlth Studies, Oslo, Norway