pembrolizumab
merck
['solid tumor', 'sequence,(-consequence)']
 that's it exactly ! we looked across solid tumor for a neoadj v. adj trial of immunotherapy where the regimen was the same, only difference was sequence. and we could not find one. this cost-neutral approach is simple but could serve as a template for other cancers 
SWOG Melanoma Chair, Med Onc at MD Anderson Cancer Center.  Tweets are my own.