the preconditions(we understand 'the preconditions for amelioration')
Wie gibt man die Vorbesserung bei Cisplatin, usw." {How are we going to achieve the preconditions to Cisplatin}

locally, in situ [on site] - vor Ort - https://www.dict.cc/?s=vor-Ort
In the following I think that, for the sense,
Mittel für Vorbesserungen vor-Ort aufgewendet werden können (the means to primarly improvement in sittu can be expended) https://www.umweltbundesamt.de/sites/default/files/medien/14...
In the following I think that, for the sense, 'vorbesserung means' before recovering:
Obwohl sich die autonomen Symptome in der Regel vor Besserung der neuromuskulären Schwäche zurückbilden, können dise in vielen Fällen auch persistieren (Freeman, 2005, Low et al. 2003) - https://books.google.pt/books?id=6kF4DwAAQBAJ&pg=PT186&lpg=P...
For the following I deduce that, for the sense, it have to be available anything before administration of Cisplatine:
Verbesserung der Sicherheit des Medikationsprozesses im Spital: - https://www.gsasa.ch/deliver.cfm?f=0CD89DA59212A7CBAEDB92D04...
What is a Pre-Existing Condition?
A medical illness or injury that you have before you start a new health care plan may be considered a “pre-existing condition.” Conditions like diabetes, COPD, cancer, and sleep apnea, may be examples of pre-existing health conditions. They tend to be chronic or long-term. - https://www.cigna.com/individuals-families/understanding-ins...