Characteristic No.
Gender (n%)
Male 25(56%)
Female 20(44%)
Age(years)
Median 11
Range 6-18
Tumor types(n%)
sarcoma 21(46.7%)
lymphoma 10(22.2%)
others 14(31.1%)
Participation times
Occasional participation (1-2 times) 19(42.2%)
In-depth participation (≥3 times) 26(57.8%)
Median 3