A pivotal study published in 1993 compared CHOP to several other chemotherapy regimens (e.g. m-BACOD, ProMACE-CytaBOM, MACOP-B).  CHOP emerged as the regimen with the least toxicity but similar efficacy.
What is the explanation for the relationship between CHOP and history?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is the explanation for the relationship between CHOP and history? [/INST] \n A pivotal study published in 1993 compared CHOP to several other chemotherapy regimens (e.g. m-BACOD, ProMACE-CytaBOM, MACOP-B).  CHOP emerged as the regimen with the least toxicity but similar efficacy.</s>