[1] Columbia Univ, Med Ctr, Childrens Hosp New York, Div Pediat Hematol Oncol & Stem Cell Transplant,D, New York, NY 10027 USA
[2] Univ British Columbia, British Columbia Childrens Hosp, Dept Surg, Div Plast Surg, Vancouver, BC, Canada
[3] Univ British Columbia, British Columbia Childrens Hosp, Dept Pathol & Lab Med, Vancouver, BC, Canada
[4] Childrens & Womens Hlth Ctr British Columbia, Pediat Pathol, Vancouver, BC, Canada
[5] Univ British Columbia, British Columbia Childrens Hosp, Div Hematopathol, Dept Pathol & Lab Med, Vancouver, BC, Canada
[6] Univ British Columbia, Fac Med, Dept Pediat, Vancouver, BC, Canada
[7] Univ British Columbia, Fac Med, Dept Dermatol, Vancouver, BC, Canada
[8] Univ British Columbia, Fac Med, Dept Skin Sci, Vancouver, BC, Canada
[9] Univ British Columbia, British Columbia Childrens Hosp, Div Pediat Hematol Oncol BMT, Dept Pediat, Vancouver, BC, Canada