<qa>  What is the name of the high-risk NB defined by risk-related treatment guidelines?- High-risk NB as defined by risk-related treatment guidelines1 and the International NB Staging System, i.e., stage 4 with any age or without 365 days of age MYCN amplification, MYCN-amplified stage 3 unresectable; any age, or MYCN-amplified stage 4S. 