Key Graph. Black and white nodes indicate high and less frequently used words in the interview, respectively. The solid, dashed and dotted line indicates degree of co-occurrence between nodes as high, middle and low level, respectively. White nodes indicate words that appeared less frequently in the interview. Personal information was exchanged to general words before submission of the manuscript. Abbreviations; NMDP: the National Marrow Donor Program, HLA: Human Leukocyte Antigen.