CD34 and glycogen storage disease VI: Second, considering that the rate of collected CD34+ stem cells of 8.0 × 106/kg or greater was significantly higher in the etoposide group, single-dose etoposide plus G-CSF may be a better choice for patients with specific disease-related conditions, including patients with extra-medullary disease and high-risk cytogenetics who require a tandem ASCT [28,29].