The author from Singapore would like to acknowledge the contributions of Ms Yang Li Yi, Mr Sun Wen Tian and Mr Vallalan Natesan for the analysis of Bcr-Abl kinase mutation and Ms Clairice Lim, Ms Valerie Wee and Dr William Hwang for data management. The work was supported by funds from the Singapore Cancer Syndicate (SCS-TS0065 and SCS-AS0076). The authors from Korea would like to acknowledge Dr Hyun-Gyung Goh, Dr Sahee Park, the Korean Society of Hematopoietic Stem Cell Transplantation and Korean Nursing Group of HSCT. This work was supported by a grant from the National Cancer Control R& D Program 2003 (0320290-3), Ministry of Health and Welfare (Republic of Korea), and by a grant no. R21-2002-000-00010-0 (2007) from the National Research Resource Bank Program of the Korea Science and Engineering Foundation, Ministry of Science and Technology. The author from Hong Kong would like to thank Dr Raymond Liang (University Of Hong Kong), Mr Oscar Man (Hong Kong Cancer Registry), Ms Win Lui (QMH records office), Ms Crosby Lu (BMT registry) and Ms Peggy Chiu (HLA registry) for data management; and Dr Edmond SK Ma (Hong Kong Sanatorium Hospital) for data on Bcr/ Abl mutations. The author from China is indebted to Dr Chunlin Zhou (Peking Union Medical College) for his involvement in the manuscript preparation. The author from India acknowledges the important contribution of Dr Lalit Kumar (IRCH, All India Institute of Medical Sciences, New Delhi).